20403721840

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3228437}}^1$

素因数の和:3228529

約数の個数: 40

約数和(自身を含む): 48039157440

約数和(自身を除く): 27635435600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 3228437, 6456874, 12913748, 16142185, 25827496, 32284370, 51654992, 64568740, 129137480, 255046523, 258274960, 510093046, 1020186092, 1275232615, 2040372184, 2550465230, 4080744368, 5100930460, 10201860920, 20403721840]

約数ペア:

[(1, 20403721840), (2, 10201860920), (4, 5100930460), (5, 4080744368), (8, 2550465230), (10, 2040372184), (16, 1275232615), (20, 1020186092), (40, 510093046), (79, 258274960), (80, 255046523), (158, 129137480), (316, 64568740), (395, 51654992), (632, 32284370), (790, 25827496), (1264, 16142185), (1580, 12913748), (3160, 6456874), (6320, 3228437)]