21037205

素因数分解:

$5^1\times 7^1\times {\mathrm{647}}^1\times {\mathrm{929}}^1$

素因数の和:1588

約数の個数: 16

約数和(自身を含む): 28926720

約数和(自身を除く): 7889515

約数列:

[1, 5, 7, 35, 647, 929, 3235, 4529, 4645, 6503, 22645, 32515, 601063, 3005315, 4207441, 21037205]

約数ペア:

[(1, 21037205), (5, 4207441), (7, 3005315), (35, 601063), (647, 32515), (929, 22645), (3235, 6503), (4529, 4645)]