20778440

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4597}}^1$

素因数の和:4721

約数の個数: 32

約数和(自身を含む): 47175480

約数和(自身を除く): 26397040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4520, 4597, 9194, 18388, 22985, 36776, 45970, 91940, 183880, 519461, 1038922, 2077844, 2597305, 4155688, 5194610, 10389220, 20778440]

約数ペア:

[(1, 20778440), (2, 10389220), (4, 5194610), (5, 4155688), (8, 2597305), (10, 2077844), (20, 1038922), (40, 519461), (113, 183880), (226, 91940), (452, 45970), (565, 36776), (904, 22985), (1130, 18388), (2260, 9194), (4520, 4597)]