128810680

素因数分解:

$2^3\times 5^1\times {\mathrm{3220267}}^1$

素因数の和:3220278

約数の個数: 16

約数和(自身を含む): 289824120

約数和(自身を除く): 161013440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3220267, 6440534, 12881068, 16101335, 25762136, 32202670, 64405340, 128810680]

約数ペア:

[(1, 128810680), (2, 64405340), (4, 32202670), (5, 25762136), (8, 16101335), (10, 12881068), (20, 6440534), (40, 3220267)]