8128720

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:212

約数の個数: 80

約数和(自身を含む): 20623680

約数和(自身を除く): 12494960

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 43, 68, 80, 85, 86, 136, 139, 170, 172, 215, 272, 278, 340, 344, 430, 556, 680, 688, 695, 731, 860, 1112, 1360, 1390, 1462, 1720, 2224, 2363, 2780, 2924, 3440, 3655, 4726, 5560, 5848, 5977, 7310, 9452, 11120, 11696, 11815, 11954, 14620, 18904, 23630, 23908, 29240, 29885, 37808, 47260, 47816, 58480, 59770, 94520, 95632, 101609, 119540, 189040, 203218, 239080, 406436, 478160, 508045, 812872, 1016090, 1625744, 2032180, 4064360, 8128720]

約数ペア:

[(1, 8128720), (2, 4064360), (4, 2032180), (5, 1625744), (8, 1016090), (10, 812872), (16, 508045), (17, 478160), (20, 406436), (34, 239080), (40, 203218), (43, 189040), (68, 119540), (80, 101609), (85, 95632), (86, 94520), (136, 59770), (139, 58480), (170, 47816), (172, 47260), (215, 37808), (272, 29885), (278, 29240), (340, 23908), (344, 23630), (430, 18904), (556, 14620), (680, 11954), (688, 11815), (695, 11696), (731, 11120), (860, 9452), (1112, 7310), (1360, 5977), (1390, 5848), (1462, 5560), (1720, 4726), (2224, 3655), (2363, 3440), (2780, 2924)]