20874260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{397}}^1$

素因数の和:656

約数の個数: 48

約数和(自身を含む): 48142080

約数和(自身を除く): 27267820

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 239, 397, 478, 794, 956, 1195, 1588, 1985, 2390, 2629, 3970, 4367, 4780, 5258, 7940, 8734, 10516, 13145, 17468, 21835, 26290, 43670, 52580, 87340, 94883, 189766, 379532, 474415, 948830, 1043713, 1897660, 2087426, 4174852, 5218565, 10437130, 20874260]

約数ペア:

[(1, 20874260), (2, 10437130), (4, 5218565), (5, 4174852), (10, 2087426), (11, 1897660), (20, 1043713), (22, 948830), (44, 474415), (55, 379532), (110, 189766), (220, 94883), (239, 87340), (397, 52580), (478, 43670), (794, 26290), (956, 21835), (1195, 17468), (1588, 13145), (1985, 10516), (2390, 8734), (2629, 7940), (3970, 5258), (4367, 4780)]