21093980

素因数分解:

$2^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{9857}}^1$

素因数の和:9973

約数の個数: 24

約数和(自身を含む): 44715888

約数和(自身を除く): 23621908

約数列:

[1, 2, 4, 5, 10, 20, 107, 214, 428, 535, 1070, 2140, 9857, 19714, 39428, 49285, 98570, 197140, 1054699, 2109398, 4218796, 5273495, 10546990, 21093980]

約数ペア:

[(1, 21093980), (2, 10546990), (4, 5273495), (5, 4218796), (10, 2109398), (20, 1054699), (107, 197140), (214, 98570), (428, 49285), (535, 39428), (1070, 19714), (2140, 9857)]