21788240

素因数分解:

$2^4\times 5^1\times {\mathrm{272353}}^1$

素因数の和:272366

約数の個数: 20

約数和(自身を含む): 50657844

約数和(自身を除く): 28869604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272353, 544706, 1089412, 1361765, 2178824, 2723530, 4357648, 5447060, 10894120, 21788240]

約数ペア:

[(1, 21788240), (2, 10894120), (4, 5447060), (5, 4357648), (8, 2723530), (10, 2178824), (16, 1361765), (20, 1089412), (40, 544706), (80, 272353)]