21388240

素因数分解:

$2^4\times 5^1\times {\mathrm{267353}}^1$

素因数の和:267366

約数の個数: 20

約数和(自身を含む): 49727844

約数和(自身を除く): 28339604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267353, 534706, 1069412, 1336765, 2138824, 2673530, 4277648, 5347060, 10694120, 21388240]

約数ペア:

[(1, 21388240), (2, 10694120), (4, 5347060), (5, 4277648), (8, 2673530), (10, 2138824), (16, 1336765), (20, 1069412), (40, 534706), (80, 267353)]