21322216

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{156781}}^1$

素因数の和:156804

約数の個数: 16

約数和(自身を含む): 42331140

約数和(自身を除く): 21008924

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 156781, 313562, 627124, 1254248, 2665277, 5330554, 10661108, 21322216]

約数ペア:

[(1, 21322216), (2, 10661108), (4, 5330554), (8, 2665277), (17, 1254248), (34, 627124), (68, 313562), (136, 156781)]