21119984

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77647}}^1$

素因数の和:77672

約数の個数: 20

約数和(自身を含む): 43327584

約数和(自身を除く): 22207600

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77647, 155294, 310588, 621176, 1242352, 1319999, 2639998, 5279996, 10559992, 21119984]

約数ペア:

[(1, 21119984), (2, 10559992), (4, 5279996), (8, 2639998), (16, 1319999), (17, 1242352), (34, 621176), (68, 310588), (136, 155294), (272, 77647)]