21921670

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{128951}}^1$

素因数の和:128975

約数の個数: 16

約数和(自身を含む): 41780448

約数和(自身を除く): 19858778

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 128951, 257902, 644755, 1289510, 2192167, 4384334, 10960835, 21921670]

約数ペア:

[(1, 21921670), (2, 10960835), (5, 4384334), (10, 2192167), (17, 1289510), (34, 644755), (85, 257902), (170, 128951)]