20981529

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{4231}}^1$

素因数の和:4285

約数の個数: 24

約数和(自身を含む): 33009600

約数和(自身を除く): 12028071

約数列:

[1, 3, 9, 19, 29, 57, 87, 171, 261, 551, 1653, 4231, 4959, 12693, 38079, 80389, 122699, 241167, 368097, 723501, 1104291, 2331281, 6993843, 20981529]

約数ペア:

[(1, 20981529), (3, 6993843), (9, 2331281), (19, 1104291), (29, 723501), (57, 368097), (87, 241167), (171, 122699), (261, 80389), (551, 38079), (1653, 12693), (4231, 4959)]