21991599

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{12037}}^1$

素因数の和:12079

約数の個数: 24

約数和(自身を含む): 37558560

約数和(自身を除く): 15566961

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 12037, 36111, 84259, 108333, 252777, 349073, 758331, 1047219, 2443511, 3141657, 7330533, 21991599]

約数ペア:

[(1, 21991599), (3, 7330533), (7, 3141657), (9, 2443511), (21, 1047219), (29, 758331), (63, 349073), (87, 252777), (203, 108333), (261, 84259), (609, 36111), (1827, 12037)]