20217080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2287}}^1$

素因数の和:2328

約数の個数: 64

約数和(自身を含む): 51891840

約数和(自身を除く): 31674760

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 2287, 4420, 4574, 8840, 9148, 11435, 18296, 22870, 29731, 38879, 45740, 59462, 77758, 91480, 118924, 148655, 155516, 194395, 237848, 297310, 311032, 388790, 505427, 594620, 777580, 1010854, 1189240, 1555160, 2021708, 2527135, 4043416, 5054270, 10108540, 20217080]

約数ペア:

[(1, 20217080), (2, 10108540), (4, 5054270), (5, 4043416), (8, 2527135), (10, 2021708), (13, 1555160), (17, 1189240), (20, 1010854), (26, 777580), (34, 594620), (40, 505427), (52, 388790), (65, 311032), (68, 297310), (85, 237848), (104, 194395), (130, 155516), (136, 148655), (170, 118924), (221, 91480), (260, 77758), (340, 59462), (442, 45740), (520, 38879), (680, 29731), (884, 22870), (1105, 18296), (1768, 11435), (2210, 9148), (2287, 8840), (4420, 4574)]