66816560

素因数分解:

$2^4\times 5^1\times {\mathrm{835207}}^1$

素因数の和:835220

約数の個数: 20

約数和(自身を含む): 155348688

約数和(自身を除く): 88532128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 835207, 1670414, 3340828, 4176035, 6681656, 8352070, 13363312, 16704140, 33408280, 66816560]

約数ペア:

[(1, 66816560), (2, 33408280), (4, 16704140), (5, 13363312), (8, 8352070), (10, 6681656), (16, 4176035), (20, 3340828), (40, 1670414), (80, 835207)]