18692720

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^2\times {\mathrm{139}}^1$

素因数の和:234

約数の個数: 60

約数和(自身を含む): 44866920

約数和(自身を除く): 26174200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 139, 164, 205, 278, 328, 410, 556, 656, 695, 820, 1112, 1390, 1640, 1681, 2224, 2780, 3280, 3362, 5560, 5699, 6724, 8405, 11120, 11398, 13448, 16810, 22796, 26896, 28495, 33620, 45592, 56990, 67240, 91184, 113980, 134480, 227960, 233659, 455920, 467318, 934636, 1168295, 1869272, 2336590, 3738544, 4673180, 9346360, 18692720]

約数ペア:

[(1, 18692720), (2, 9346360), (4, 4673180), (5, 3738544), (8, 2336590), (10, 1869272), (16, 1168295), (20, 934636), (40, 467318), (41, 455920), (80, 233659), (82, 227960), (139, 134480), (164, 113980), (205, 91184), (278, 67240), (328, 56990), (410, 45592), (556, 33620), (656, 28495), (695, 26896), (820, 22796), (1112, 16810), (1390, 13448), (1640, 11398), (1681, 11120), (2224, 8405), (2780, 6724), (3280, 5699), (3362, 5560)]