21313240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2411}}^1$

素因数の和:2452

約数の個数: 64

約数和(自身を含む): 54704160

約数和(自身を除く): 33390920

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, 2411, 4420, 4822, 8840, 9644, 12055, 19288, 24110, 31343, 40987, 48220, 62686, 81974, 96440, 125372, 156715, 163948, 204935, 250744, 313430, 327896, 409870, 532831, 626860, 819740, 1065662, 1253720, 1639480, 2131324, 2664155, 4262648, 5328310, 10656620, 21313240]

約数ペア:

[(1, 21313240), (2, 10656620), (4, 5328310), (5, 4262648), (8, 2664155), (10, 2131324), (13, 1639480), (17, 1253720), (20, 1065662), (26, 819740), (34, 626860), (40, 532831), (52, 409870), (65, 327896), (68, 313430), (85, 250744), (104, 204935), (130, 163948), (136, 156715), (170, 125372), (221, 96440), (260, 81974), (340, 62686), (442, 48220), (520, 40987), (680, 31343), (884, 24110), (1105, 19288), (1768, 12055), (2210, 9644), (2411, 8840), (4420, 4822)]