21235820

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6763}}^1$

素因数の和:6929

約数の個数: 24

約数和(自身を含む): 44885904

約数和(自身を除く): 23650084

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6763, 13526, 27052, 33815, 67630, 135260, 1061791, 2123582, 4247164, 5308955, 10617910, 21235820]

約数ペア:

[(1, 21235820), (2, 10617910), (4, 5308955), (5, 4247164), (10, 2123582), (20, 1061791), (157, 135260), (314, 67630), (628, 33815), (785, 27052), (1570, 13526), (3140, 6763)]