21658520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41651}}^1$

素因数の和:41675

約数の個数: 32

約数和(自身を含む): 52481520

約数和(自身を除く): 30823000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41651, 83302, 166604, 208255, 333208, 416510, 541463, 833020, 1082926, 1666040, 2165852, 2707315, 4331704, 5414630, 10829260, 21658520]

約数ペア:

[(1, 21658520), (2, 10829260), (4, 5414630), (5, 4331704), (8, 2707315), (10, 2165852), (13, 1666040), (20, 1082926), (26, 833020), (40, 541463), (52, 416510), (65, 333208), (104, 208255), (130, 166604), (260, 83302), (520, 41651)]