256807980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{907}}^1$

素因数の和:957

約数の個数: 216

約数和(自身を含む): 923120016

約数和(自身を除く): 666312036

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 15, 18, 20, 22, 26, 30, 33, 36, 39, 44, 45, 52, 55, 60, 65, 66, 78, 90, 99, 110, 117, 121, 130, 132, 143, 156, 165, 180, 195, 198, 220, 234, 242, 260, 286, 330, 363, 390, 396, 429, 468, 484, 495, 572, 585, 605, 660, 715, 726, 780, 858, 907, 990, 1089, 1170, 1210, 1287, 1430, 1452, 1573, 1716, 1814, 1815, 1980, 2145, 2178, 2340, 2420, 2574, 2721, 2860, 3146, 3628, 3630, 4290, 4356, 4535, 4719, 5148, 5442, 5445, 6292, 6435, 7260, 7865, 8163, 8580, 9070, 9438, 9977, 10884, 10890, 11791, 12870, 13605, 14157, 15730, 16326, 18140, 18876, 19954, 21780, 23582, 23595, 25740, 27210, 28314, 29931, 31460, 32652, 35373, 39908, 40815, 47164, 47190, 49885, 54420, 56628, 58955, 59862, 70746, 70785, 81630, 89793, 94380, 99770, 106119, 109747, 117910, 119724, 129701, 141492, 141570, 149655, 163260, 176865, 179586, 199540, 212238, 219494, 235820, 259402, 283140, 299310, 329241, 353730, 359172, 389103, 424476, 438988, 448965, 518804, 530595, 548735, 598620, 648505, 658482, 707460, 778206, 897930, 987723, 1061190, 1097470, 1167309, 1297010, 1316964, 1426711, 1556412, 1646205, 1795860, 1945515, 1975446, 2122380, 2194940, 2334618, 2594020, 2853422, 3292410, 3891030, 3950892, 4280133, 4669236, 4938615, 5706844, 5836545, 6584820, 7133555, 7782060, 8560266, 9877230, 11673090, 12840399, 14267110, 17120532, 19754460, 21400665, 23346180, 25680798, 28534220, 42801330, 51361596, 64201995, 85602660, 128403990, 256807980]

約数ペア:

[(1, 256807980), (2, 128403990), (3, 85602660), (4, 64201995), (5, 51361596), (6, 42801330), (9, 28534220), (10, 25680798), (11, 23346180), (12, 21400665), (13, 19754460), (15, 17120532), (18, 14267110), (20, 12840399), (22, 11673090), (26, 9877230), (30, 8560266), (33, 7782060), (36, 7133555), (39, 6584820), (44, 5836545), (45, 5706844), (52, 4938615), (55, 4669236), (60, 4280133), (65, 3950892), (66, 3891030), (78, 3292410), (90, 2853422), (99, 2594020), (110, 2334618), (117, 2194940), (121, 2122380), (130, 1975446), (132, 1945515), (143, 1795860), (156, 1646205), (165, 1556412), (180, 1426711), (195, 1316964), (198, 1297010), (220, 1167309), (234, 1097470), (242, 1061190), (260, 987723), (286, 897930), (330, 778206), (363, 707460), (390, 658482), (396, 648505), (429, 598620), (468, 548735), (484, 530595), (495, 518804), (572, 448965), (585, 438988), (605, 424476), (660, 389103), (715, 359172), (726, 353730), (780, 329241), (858, 299310), (907, 283140), (990, 259402), (1089, 235820), (1170, 219494), (1210, 212238), (1287, 199540), (1430, 179586), (1452, 176865), (1573, 163260), (1716, 149655), (1814, 141570), (1815, 141492), (1980, 129701), (2145, 119724), (2178, 117910), (2340, 109747), (2420, 106119), (2574, 99770), (2721, 94380), (2860, 89793), (3146, 81630), (3628, 70785), (3630, 70746), (4290, 59862), (4356, 58955), (4535, 56628), (4719, 54420), (5148, 49885), (5442, 47190), (5445, 47164), (6292, 40815), (6435, 39908), (7260, 35373), (7865, 32652), (8163, 31460), (8580, 29931), (9070, 28314), (9438, 27210), (9977, 25740), (10884, 23595), (10890, 23582), (11791, 21780), (12870, 19954), (13605, 18876), (14157, 18140), (15730, 16326)]