81471520

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:195

約数の個数: 144

約数和(自身を含む): 219143232

約数和(自身を除く): 137671712

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 32, 40, 46, 52, 65, 80, 92, 104, 115, 130, 131, 160, 169, 184, 208, 230, 260, 262, 299, 338, 368, 416, 460, 520, 524, 598, 655, 676, 736, 845, 920, 1040, 1048, 1196, 1310, 1352, 1495, 1690, 1703, 1840, 2080, 2096, 2392, 2620, 2704, 2990, 3013, 3380, 3406, 3680, 3887, 4192, 4784, 5240, 5408, 5980, 6026, 6760, 6812, 7774, 8515, 9568, 10480, 11960, 12052, 13520, 13624, 15065, 15548, 17030, 19435, 20960, 22139, 23920, 24104, 27040, 27248, 30130, 31096, 34060, 38870, 39169, 44278, 47840, 48208, 54496, 60260, 62192, 68120, 77740, 78338, 88556, 96416, 110695, 120520, 124384, 136240, 155480, 156676, 177112, 195845, 221390, 241040, 272480, 310960, 313352, 354224, 391690, 442780, 482080, 509197, 621920, 626704, 708448, 783380, 885560, 1018394, 1253408, 1566760, 1771120, 2036788, 2545985, 3133520, 3542240, 4073576, 5091970, 6267040, 8147152, 10183940, 16294304, 20367880, 40735760, 81471520]

約数ペア:

[(1, 81471520), (2, 40735760), (4, 20367880), (5, 16294304), (8, 10183940), (10, 8147152), (13, 6267040), (16, 5091970), (20, 4073576), (23, 3542240), (26, 3133520), (32, 2545985), (40, 2036788), (46, 1771120), (52, 1566760), (65, 1253408), (80, 1018394), (92, 885560), (104, 783380), (115, 708448), (130, 626704), (131, 621920), (160, 509197), (169, 482080), (184, 442780), (208, 391690), (230, 354224), (260, 313352), (262, 310960), (299, 272480), (338, 241040), (368, 221390), (416, 195845), (460, 177112), (520, 156676), (524, 155480), (598, 136240), (655, 124384), (676, 120520), (736, 110695), (845, 96416), (920, 88556), (1040, 78338), (1048, 77740), (1196, 68120), (1310, 62192), (1352, 60260), (1495, 54496), (1690, 48208), (1703, 47840), (1840, 44278), (2080, 39169), (2096, 38870), (2392, 34060), (2620, 31096), (2704, 30130), (2990, 27248), (3013, 27040), (3380, 24104), (3406, 23920), (3680, 22139), (3887, 20960), (4192, 19435), (4784, 17030), (5240, 15548), (5408, 15065), (5980, 13624), (6026, 13520), (6760, 12052), (6812, 11960), (7774, 10480), (8515, 9568)]