21362680

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2711}}^1$

素因数の和:2919

約数の個数: 32

約数和(自身を含む): 48327840

約数和(自身を除く): 26965160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2711, 3940, 5422, 7880, 10844, 13555, 21688, 27110, 54220, 108440, 534067, 1068134, 2136268, 2670335, 4272536, 5340670, 10681340, 21362680]

約数ペア:

[(1, 21362680), (2, 10681340), (4, 5340670), (5, 4272536), (8, 2670335), (10, 2136268), (20, 1068134), (40, 534067), (197, 108440), (394, 54220), (788, 27110), (985, 21688), (1576, 13555), (1970, 10844), (2711, 7880), (3940, 5422)]