21459916

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{401}}^1\times {\mathrm{787}}^1$

素因数の和:1209

約数の個数: 24

約数和(自身を含む): 39913776

約数和(自身を除く): 18453860

約数列:

[1, 2, 4, 17, 34, 68, 401, 787, 802, 1574, 1604, 3148, 6817, 13379, 13634, 26758, 27268, 53516, 315587, 631174, 1262348, 5364979, 10729958, 21459916]

約数ペア:

[(1, 21459916), (2, 10729958), (4, 5364979), (17, 1262348), (34, 631174), (68, 315587), (401, 53516), (787, 27268), (802, 26758), (1574, 13634), (1604, 13379), (3148, 6817)]