81301220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:202

約数の個数: 192

約数和(自身を含む): 238436352

約数和(自身を除く): 157135132

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 31, 35, 44, 52, 55, 62, 65, 70, 77, 91, 110, 124, 130, 131, 140, 143, 154, 155, 182, 217, 220, 260, 262, 286, 308, 310, 341, 364, 385, 403, 434, 455, 524, 572, 620, 655, 682, 715, 770, 806, 868, 910, 917, 1001, 1085, 1310, 1364, 1430, 1441, 1540, 1612, 1703, 1705, 1820, 1834, 2002, 2015, 2170, 2387, 2620, 2821, 2860, 2882, 3406, 3410, 3668, 4004, 4030, 4061, 4340, 4433, 4585, 4774, 5005, 5642, 5764, 6812, 6820, 7205, 8060, 8122, 8515, 8866, 9170, 9548, 10010, 10087, 11284, 11921, 11935, 14105, 14410, 16244, 17030, 17732, 18340, 18733, 20020, 20174, 20305, 22165, 23842, 23870, 28210, 28427, 28820, 31031, 34060, 37466, 40348, 40610, 44330, 44671, 47684, 47740, 50435, 52793, 56420, 56854, 59605, 62062, 74932, 81220, 88660, 89342, 93665, 100870, 105586, 113708, 119210, 124124, 131131, 142135, 155155, 178684, 187330, 201740, 211172, 223355, 238420, 262262, 263965, 284270, 310310, 312697, 369551, 374660, 446710, 524524, 527930, 568540, 580723, 620620, 625394, 655655, 739102, 893420, 1055860, 1161446, 1250788, 1311310, 1478204, 1563485, 1847755, 2322892, 2622620, 2903615, 3126970, 3695510, 4065061, 5807230, 6253940, 7391020, 8130122, 11614460, 16260244, 20325305, 40650610, 81301220]

約数ペア:

[(1, 81301220), (2, 40650610), (4, 20325305), (5, 16260244), (7, 11614460), (10, 8130122), (11, 7391020), (13, 6253940), (14, 5807230), (20, 4065061), (22, 3695510), (26, 3126970), (28, 2903615), (31, 2622620), (35, 2322892), (44, 1847755), (52, 1563485), (55, 1478204), (62, 1311310), (65, 1250788), (70, 1161446), (77, 1055860), (91, 893420), (110, 739102), (124, 655655), (130, 625394), (131, 620620), (140, 580723), (143, 568540), (154, 527930), (155, 524524), (182, 446710), (217, 374660), (220, 369551), (260, 312697), (262, 310310), (286, 284270), (308, 263965), (310, 262262), (341, 238420), (364, 223355), (385, 211172), (403, 201740), (434, 187330), (455, 178684), (524, 155155), (572, 142135), (620, 131131), (655, 124124), (682, 119210), (715, 113708), (770, 105586), (806, 100870), (868, 93665), (910, 89342), (917, 88660), (1001, 81220), (1085, 74932), (1310, 62062), (1364, 59605), (1430, 56854), (1441, 56420), (1540, 52793), (1612, 50435), (1703, 47740), (1705, 47684), (1820, 44671), (1834, 44330), (2002, 40610), (2015, 40348), (2170, 37466), (2387, 34060), (2620, 31031), (2821, 28820), (2860, 28427), (2882, 28210), (3406, 23870), (3410, 23842), (3668, 22165), (4004, 20305), (4030, 20174), (4061, 20020), (4340, 18733), (4433, 18340), (4585, 17732), (4774, 17030), (5005, 16244), (5642, 14410), (5764, 14105), (6812, 11935), (6820, 11921), (7205, 11284), (8060, 10087), (8122, 10010), (8515, 9548), (8866, 9170)]