90108520

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{21871}}^1$

素因数の和:21985

約数の個数: 32

約数和(自身を含む): 204721920

約数和(自身を除く): 114613400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 21871, 43742, 87484, 109355, 174968, 218710, 437420, 874840, 2252713, 4505426, 9010852, 11263565, 18021704, 22527130, 45054260, 90108520]

約数ペア:

[(1, 90108520), (2, 45054260), (4, 22527130), (5, 18021704), (8, 11263565), (10, 9010852), (20, 4505426), (40, 2252713), (103, 874840), (206, 437420), (412, 218710), (515, 174968), (824, 109355), (1030, 87484), (2060, 43742), (4120, 21871)]