64980560

素因数分解:

$2^4\times 5^1\times {\mathrm{812257}}^1$

素因数の和:812270

約数の個数: 20

約数和(自身を含む): 151079988

約数和(自身を除く): 86099428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 812257, 1624514, 3249028, 4061285, 6498056, 8122570, 12996112, 16245140, 32490280, 64980560]

約数ペア:

[(1, 64980560), (2, 32490280), (4, 16245140), (5, 12996112), (8, 8122570), (10, 6498056), (16, 4061285), (20, 3249028), (40, 1624514), (80, 812257)]