201913640

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{16231}}^1$

素因数の和:16553

約数の個数: 32

約数和(自身を含む): 455794560

約数和(自身を除く): 253880920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 3110, 6220, 12440, 16231, 32462, 64924, 81155, 129848, 162310, 324620, 649240, 5047841, 10095682, 20191364, 25239205, 40382728, 50478410, 100956820, 201913640]

約数ペア:

[(1, 201913640), (2, 100956820), (4, 50478410), (5, 40382728), (8, 25239205), (10, 20191364), (20, 10095682), (40, 5047841), (311, 649240), (622, 324620), (1244, 162310), (1555, 129848), (2488, 81155), (3110, 64924), (6220, 32462), (12440, 16231)]