21443920

素因数分解:

$2^4\times 5^1\times {\mathrm{268049}}^1$

素因数の和:268062

約数の個数: 20

約数和(自身を含む): 49857300

約数和(自身を除く): 28413380

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268049, 536098, 1072196, 1340245, 2144392, 2680490, 4288784, 5360980, 10721960, 21443920]

約数ペア:

[(1, 21443920), (2, 10721960), (4, 5360980), (5, 4288784), (8, 2680490), (10, 2144392), (16, 1340245), (20, 1072196), (40, 536098), (80, 268049)]