21400390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{257}}^1\times {\mathrm{757}}^1$

素因数の和:1032

約数の個数: 32

約数和(自身を含む): 42241824

約数和(自身を除く): 20841434

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 257, 514, 757, 1285, 1514, 2570, 2827, 3785, 5654, 7570, 8327, 14135, 16654, 28270, 41635, 83270, 194549, 389098, 972745, 1945490, 2140039, 4280078, 10700195, 21400390]

約数ペア:

[(1, 21400390), (2, 10700195), (5, 4280078), (10, 2140039), (11, 1945490), (22, 972745), (55, 389098), (110, 194549), (257, 83270), (514, 41635), (757, 28270), (1285, 16654), (1514, 14135), (2570, 8327), (2827, 7570), (3785, 5654)]