20479910

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{239}}^1$

素因数の和:317

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 23065690

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 41, 55, 82, 95, 110, 190, 205, 209, 239, 410, 418, 451, 478, 779, 902, 1045, 1195, 1558, 2090, 2255, 2390, 2629, 3895, 4510, 4541, 5258, 7790, 8569, 9082, 9799, 13145, 17138, 19598, 22705, 26290, 42845, 45410, 48995, 49951, 85690, 97990, 99902, 107789, 186181, 215578, 249755, 372362, 499510, 538945, 930905, 1077890, 1861810, 2047991, 4095982, 10239955, 20479910]

約数ペア:

[(1, 20479910), (2, 10239955), (5, 4095982), (10, 2047991), (11, 1861810), (19, 1077890), (22, 930905), (38, 538945), (41, 499510), (55, 372362), (82, 249755), (95, 215578), (110, 186181), (190, 107789), (205, 99902), (209, 97990), (239, 85690), (410, 49951), (418, 48995), (451, 45410), (478, 42845), (779, 26290), (902, 22705), (1045, 19598), (1195, 17138), (1558, 13145), (2090, 9799), (2255, 9082), (2390, 8569), (2629, 7790), (3895, 5258), (4510, 4541)]