21009008

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77239}}^1$

素因数の和:77264

約数の個数: 20

約数和(自身を含む): 43099920

約数和(自身を除く): 22090912

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77239, 154478, 308956, 617912, 1235824, 1313063, 2626126, 5252252, 10504504, 21009008]

約数ペア:

[(1, 21009008), (2, 10504504), (4, 5252252), (8, 2626126), (16, 1313063), (17, 1235824), (34, 617912), (68, 308956), (136, 154478), (272, 77239)]