21291344

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78277}}^1$

素因数の和:78302

約数の個数: 20

約数和(自身を含む): 43679124

約数和(自身を除く): 22387780

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78277, 156554, 313108, 626216, 1252432, 1330709, 2661418, 5322836, 10645672, 21291344]

約数ペア:

[(1, 21291344), (2, 10645672), (4, 5322836), (8, 2661418), (16, 1330709), (17, 1252432), (34, 626216), (68, 313108), (136, 156554), (272, 78277)]