128434480

素因数分解:

$2^4\times 5^1\times {\mathrm{1605431}}^1$

素因数の和:1605444

約数の個数: 20

約数和(自身を含む): 298610352

約数和(自身を除く): 170175872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1605431, 3210862, 6421724, 8027155, 12843448, 16054310, 25686896, 32108620, 64217240, 128434480]

約数ペア:

[(1, 128434480), (2, 64217240), (4, 32108620), (5, 25686896), (8, 16054310), (10, 12843448), (16, 8027155), (20, 6421724), (40, 3210862), (80, 1605431)]