20307980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13187}}^1$

素因数の和:13214

約数の個数: 48

約数和(自身を含む): 53174016

約数和(自身を除く): 32866036

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13187, 26374, 52748, 65935, 92309, 131870, 145057, 184618, 263740, 290114, 369236, 461545, 580228, 725285, 923090, 1015399, 1450570, 1846180, 2030798, 2901140, 4061596, 5076995, 10153990, 20307980]

約数ペア:

[(1, 20307980), (2, 10153990), (4, 5076995), (5, 4061596), (7, 2901140), (10, 2030798), (11, 1846180), (14, 1450570), (20, 1015399), (22, 923090), (28, 725285), (35, 580228), (44, 461545), (55, 369236), (70, 290114), (77, 263740), (110, 184618), (140, 145057), (154, 131870), (220, 92309), (308, 65935), (385, 52748), (770, 26374), (1540, 13187)]