20979530

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{863}}^1$

素因数の和:911

約数の個数: 64

約数和(自身を含む): 47029248

約数和(自身を除く): 26049718

約数列:

[1, 2, 5, 10, 11, 13, 17, 22, 26, 34, 55, 65, 85, 110, 130, 143, 170, 187, 221, 286, 374, 442, 715, 863, 935, 1105, 1430, 1726, 1870, 2210, 2431, 4315, 4862, 8630, 9493, 11219, 12155, 14671, 18986, 22438, 24310, 29342, 47465, 56095, 73355, 94930, 112190, 123409, 146710, 161381, 190723, 246818, 322762, 381446, 617045, 806905, 953615, 1234090, 1613810, 1907230, 2097953, 4195906, 10489765, 20979530]

約数ペア:

[(1, 20979530), (2, 10489765), (5, 4195906), (10, 2097953), (11, 1907230), (13, 1613810), (17, 1234090), (22, 953615), (26, 806905), (34, 617045), (55, 381446), (65, 322762), (85, 246818), (110, 190723), (130, 161381), (143, 146710), (170, 123409), (187, 112190), (221, 94930), (286, 73355), (374, 56095), (442, 47465), (715, 29342), (863, 24310), (935, 22438), (1105, 18986), (1430, 14671), (1726, 12155), (1870, 11219), (2210, 9493), (2431, 8630), (4315, 4862)]