21898940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{156421}}^1$

素因数の和:156437

約数の個数: 24

約数和(自身を含む): 52557792

約数和(自身を除く): 30658852

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 156421, 312842, 625684, 782105, 1094947, 1564210, 2189894, 3128420, 4379788, 5474735, 10949470, 21898940]

約数ペア:

[(1, 21898940), (2, 10949470), (4, 5474735), (5, 4379788), (7, 3128420), (10, 2189894), (14, 1564210), (20, 1094947), (28, 782105), (35, 625684), (70, 312842), (140, 156421)]