28996840

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{17681}}^1$

素因数の和:17733

約数の個数: 32

約数和(自身を含む): 66837960

約数和(自身を除く): 37841120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 17681, 35362, 70724, 88405, 141448, 176810, 353620, 707240, 724921, 1449842, 2899684, 3624605, 5799368, 7249210, 14498420, 28996840]

約数ペア:

[(1, 28996840), (2, 14498420), (4, 7249210), (5, 5799368), (8, 3624605), (10, 2899684), (20, 1449842), (40, 724921), (41, 707240), (82, 353620), (164, 176810), (205, 141448), (328, 88405), (410, 70724), (820, 35362), (1640, 17681)]