19974680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4127}}^1$

素因数の和:4160

約数の個数: 48

約数和(自身を含む): 49412160

約数和(自身を除く): 29437480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4127, 4840, 8254, 16508, 20635, 33016, 41270, 45397, 82540, 90794, 165080, 181588, 226985, 363176, 453970, 499367, 907940, 998734, 1815880, 1997468, 2496835, 3994936, 4993670, 9987340, 19974680]

約数ペア:

[(1, 19974680), (2, 9987340), (4, 4993670), (5, 3994936), (8, 2496835), (10, 1997468), (11, 1815880), (20, 998734), (22, 907940), (40, 499367), (44, 453970), (55, 363176), (88, 226985), (110, 181588), (121, 165080), (220, 90794), (242, 82540), (440, 45397), (484, 41270), (605, 33016), (968, 20635), (1210, 16508), (2420, 8254), (4127, 4840)]