397996840

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{242681}}^1$

素因数の和:242733

約数の個数: 32

約数和(自身を含む): 917337960

約数和(自身を除く): 519341120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 242681, 485362, 970724, 1213405, 1941448, 2426810, 4853620, 9707240, 9949921, 19899842, 39799684, 49749605, 79599368, 99499210, 198998420, 397996840]

約数ペア:

[(1, 397996840), (2, 198998420), (4, 99499210), (5, 79599368), (8, 49749605), (10, 39799684), (20, 19899842), (40, 9949921), (41, 9707240), (82, 4853620), (164, 2426810), (205, 1941448), (328, 1213405), (410, 970724), (820, 485362), (1640, 242681)]