51290320

素因数分解:

$2^4\times 5^1\times {\mathrm{641129}}^1$

素因数の和:641142

約数の個数: 20

約数和(自身を含む): 119250180

約数和(自身を除く): 67959860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 641129, 1282258, 2564516, 3205645, 5129032, 6411290, 10258064, 12822580, 25645160, 51290320]

約数ペア:

[(1, 51290320), (2, 25645160), (4, 12822580), (5, 10258064), (8, 6411290), (10, 5129032), (16, 3205645), (20, 2564516), (40, 1282258), (80, 641129)]