21355820

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{20147}}^1$

素因数の和:20209

約数の個数: 24

約数和(自身を含む): 45695664

約数和(自身を除く): 24339844

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 20147, 40294, 80588, 100735, 201470, 402940, 1067791, 2135582, 4271164, 5338955, 10677910, 21355820]

約数ペア:

[(1, 21355820), (2, 10677910), (4, 5338955), (5, 4271164), (10, 2135582), (20, 1067791), (53, 402940), (106, 201470), (212, 100735), (265, 80588), (530, 40294), (1060, 20147)]