20268380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{509}}^1$

素因数の和:710

約数の個数: 48

約数和(自身を含む): 46781280

約数和(自身を除く): 26512900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 181, 220, 362, 509, 724, 905, 1018, 1810, 1991, 2036, 2545, 3620, 3982, 5090, 5599, 7964, 9955, 10180, 11198, 19910, 22396, 27995, 39820, 55990, 92129, 111980, 184258, 368516, 460645, 921290, 1013419, 1842580, 2026838, 4053676, 5067095, 10134190, 20268380]

約数ペア:

[(1, 20268380), (2, 10134190), (4, 5067095), (5, 4053676), (10, 2026838), (11, 1842580), (20, 1013419), (22, 921290), (44, 460645), (55, 368516), (110, 184258), (181, 111980), (220, 92129), (362, 55990), (509, 39820), (724, 27995), (905, 22396), (1018, 19910), (1810, 11198), (1991, 10180), (2036, 9955), (2545, 7964), (3620, 5599), (3982, 5090)]