399740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:122

約数の個数: 48

約数和(自身を含む): 967680

約数和(自身を除く): 567940

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 79, 92, 110, 115, 158, 220, 230, 253, 316, 395, 460, 506, 790, 869, 1012, 1265, 1580, 1738, 1817, 2530, 3476, 3634, 4345, 5060, 7268, 8690, 9085, 17380, 18170, 19987, 36340, 39974, 79948, 99935, 199870, 399740]

約数ペア:

[(1, 399740), (2, 199870), (4, 99935), (5, 79948), (10, 39974), (11, 36340), (20, 19987), (22, 18170), (23, 17380), (44, 9085), (46, 8690), (55, 7268), (79, 5060), (92, 4345), (110, 3634), (115, 3476), (158, 2530), (220, 1817), (230, 1738), (253, 1580), (316, 1265), (395, 1012), (460, 869), (506, 790)]