21920240

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^2\times {\mathrm{163}}^1$

素因数の和:258

約数の個数: 60

約数和(自身を含む): 52558392

約数和(自身を除く): 30638152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 163, 164, 205, 326, 328, 410, 652, 656, 815, 820, 1304, 1630, 1640, 1681, 2608, 3260, 3280, 3362, 6520, 6683, 6724, 8405, 13040, 13366, 13448, 16810, 26732, 26896, 33415, 33620, 53464, 66830, 67240, 106928, 133660, 134480, 267320, 274003, 534640, 548006, 1096012, 1370015, 2192024, 2740030, 4384048, 5480060, 10960120, 21920240]

約数ペア:

[(1, 21920240), (2, 10960120), (4, 5480060), (5, 4384048), (8, 2740030), (10, 2192024), (16, 1370015), (20, 1096012), (40, 548006), (41, 534640), (80, 274003), (82, 267320), (163, 134480), (164, 133660), (205, 106928), (326, 67240), (328, 66830), (410, 53464), (652, 33620), (656, 33415), (815, 26896), (820, 26732), (1304, 16810), (1630, 13448), (1640, 13366), (1681, 13040), (2608, 8405), (3260, 6724), (3280, 6683), (3362, 6520)]