128466640

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{20327}}^1$

素因数の和:20419

約数の個数: 40

約数和(自身を含む): 302480640

約数和(自身を除く): 174014000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 20327, 40654, 81308, 101635, 162616, 203270, 325232, 406540, 813080, 1605833, 1626160, 3211666, 6423332, 8029165, 12846664, 16058330, 25693328, 32116660, 64233320, 128466640]

約数ペア:

[(1, 128466640), (2, 64233320), (4, 32116660), (5, 25693328), (8, 16058330), (10, 12846664), (16, 8029165), (20, 6423332), (40, 3211666), (79, 1626160), (80, 1605833), (158, 813080), (316, 406540), (395, 325232), (632, 203270), (790, 162616), (1264, 101635), (1580, 81308), (3160, 40654), (6320, 20327)]