21008020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8681}}^1$

素因数の和:8712

約数の個数: 36

約数和(自身を含む): 48497652

約数和(自身を除く): 27489632

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8681, 17362, 34724, 43405, 86810, 95491, 173620, 190982, 381964, 477455, 954910, 1050401, 1909820, 2100802, 4201604, 5252005, 10504010, 21008020]

約数ペア:

[(1, 21008020), (2, 10504010), (4, 5252005), (5, 4201604), (10, 2100802), (11, 1909820), (20, 1050401), (22, 954910), (44, 477455), (55, 381964), (110, 190982), (121, 173620), (220, 95491), (242, 86810), (484, 43405), (605, 34724), (1210, 17362), (2420, 8681)]