81655980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:228

約数の個数: 192

約数和(自身を含む): 278691840

約数和(自身を除く): 197035860

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 23, 28, 30, 35, 42, 46, 60, 69, 70, 79, 84, 92, 105, 107, 115, 138, 140, 158, 161, 210, 214, 230, 237, 276, 316, 321, 322, 345, 395, 420, 428, 460, 474, 483, 535, 553, 642, 644, 690, 749, 790, 805, 948, 966, 1070, 1106, 1185, 1284, 1380, 1498, 1580, 1605, 1610, 1659, 1817, 1932, 2140, 2212, 2247, 2370, 2415, 2461, 2765, 2996, 3210, 3220, 3318, 3634, 3745, 4494, 4740, 4830, 4922, 5451, 5530, 6420, 6636, 7268, 7383, 7490, 8295, 8453, 8988, 9085, 9660, 9844, 10902, 11060, 11235, 12305, 12719, 14766, 14980, 16590, 16906, 17227, 18170, 21804, 22470, 24610, 25359, 25438, 27255, 29532, 33180, 33812, 34454, 36340, 36915, 38157, 42265, 44940, 49220, 50718, 50876, 51681, 54510, 59171, 63595, 68908, 73830, 76314, 84530, 86135, 101436, 103362, 109020, 118342, 126795, 127190, 147660, 152628, 169060, 172270, 177513, 190785, 194419, 206724, 236684, 253590, 254380, 258405, 295855, 344540, 355026, 381570, 388838, 507180, 516810, 583257, 591710, 710052, 763140, 777676, 887565, 972095, 1033620, 1166514, 1183420, 1360933, 1775130, 1944190, 2333028, 2721866, 2916285, 3550260, 3888380, 4082799, 5443732, 5832570, 6804665, 8165598, 11665140, 13609330, 16331196, 20413995, 27218660, 40827990, 81655980]

約数ペア:

[(1, 81655980), (2, 40827990), (3, 27218660), (4, 20413995), (5, 16331196), (6, 13609330), (7, 11665140), (10, 8165598), (12, 6804665), (14, 5832570), (15, 5443732), (20, 4082799), (21, 3888380), (23, 3550260), (28, 2916285), (30, 2721866), (35, 2333028), (42, 1944190), (46, 1775130), (60, 1360933), (69, 1183420), (70, 1166514), (79, 1033620), (84, 972095), (92, 887565), (105, 777676), (107, 763140), (115, 710052), (138, 591710), (140, 583257), (158, 516810), (161, 507180), (210, 388838), (214, 381570), (230, 355026), (237, 344540), (276, 295855), (316, 258405), (321, 254380), (322, 253590), (345, 236684), (395, 206724), (420, 194419), (428, 190785), (460, 177513), (474, 172270), (483, 169060), (535, 152628), (553, 147660), (642, 127190), (644, 126795), (690, 118342), (749, 109020), (790, 103362), (805, 101436), (948, 86135), (966, 84530), (1070, 76314), (1106, 73830), (1185, 68908), (1284, 63595), (1380, 59171), (1498, 54510), (1580, 51681), (1605, 50876), (1610, 50718), (1659, 49220), (1817, 44940), (1932, 42265), (2140, 38157), (2212, 36915), (2247, 36340), (2370, 34454), (2415, 33812), (2461, 33180), (2765, 29532), (2996, 27255), (3210, 25438), (3220, 25359), (3318, 24610), (3634, 22470), (3745, 21804), (4494, 18170), (4740, 17227), (4830, 16906), (4922, 16590), (5451, 14980), (5530, 14766), (6420, 12719), (6636, 12305), (7268, 11235), (7383, 11060), (7490, 10902), (8295, 9844), (8453, 9660), (8988, 9085)]