21227440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20411}}^1$

素因数の和:20437

約数の個数: 40

約数和(自身を含む): 53152848

約数和(自身を除く): 31925408

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20411, 40822, 81644, 102055, 163288, 204110, 265343, 326576, 408220, 530686, 816440, 1061372, 1326715, 1632880, 2122744, 2653430, 4245488, 5306860, 10613720, 21227440]

約数ペア:

[(1, 21227440), (2, 10613720), (4, 5306860), (5, 4245488), (8, 2653430), (10, 2122744), (13, 1632880), (16, 1326715), (20, 1061372), (26, 816440), (40, 530686), (52, 408220), (65, 326576), (80, 265343), (104, 204110), (130, 163288), (208, 102055), (260, 81644), (520, 40822), (1040, 20411)]