21753980

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{6673}}^1$

素因数の和:6845

約数の個数: 24

約数和(自身を含む): 45970512

約数和(自身を除く): 24216532

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 6673, 13346, 26692, 33365, 66730, 133460, 1087699, 2175398, 4350796, 5438495, 10876990, 21753980]

約数ペア:

[(1, 21753980), (2, 10876990), (4, 5438495), (5, 4350796), (10, 2175398), (20, 1087699), (163, 133460), (326, 66730), (652, 33365), (815, 26692), (1630, 13346), (3260, 6673)]