21788980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12241}}^1$

素因数の和:12339

約数の個数: 24

約数和(自身を含む): 46274760

約数和(自身を除く): 24485780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12241, 24482, 48964, 61205, 122410, 244820, 1089449, 2178898, 4357796, 5447245, 10894490, 21788980]

約数ペア:

[(1, 21788980), (2, 10894490), (4, 5447245), (5, 4357796), (10, 2178898), (20, 1089449), (89, 244820), (178, 122410), (356, 61205), (445, 48964), (890, 24482), (1780, 12241)]