20398120

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{4951}}^1$

素因数の和:5065

約数の個数: 32

約数和(自身を含む): 46350720

約数和(自身を除く): 25952600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 4951, 9902, 19804, 24755, 39608, 49510, 99020, 198040, 509953, 1019906, 2039812, 2549765, 4079624, 5099530, 10199060, 20398120]

約数ペア:

[(1, 20398120), (2, 10199060), (4, 5099530), (5, 4079624), (8, 2549765), (10, 2039812), (20, 1019906), (40, 509953), (103, 198040), (206, 99020), (412, 49510), (515, 39608), (824, 24755), (1030, 19804), (2060, 9902), (4120, 4951)]