81870440

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{49921}}^1$

素因数の和:49973

約数の個数: 32

約数和(自身を含む): 188705160

約数和(自身を除く): 106834720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 49921, 99842, 199684, 249605, 399368, 499210, 998420, 1996840, 2046761, 4093522, 8187044, 10233805, 16374088, 20467610, 40935220, 81870440]

約数ペア:

[(1, 81870440), (2, 40935220), (4, 20467610), (5, 16374088), (8, 10233805), (10, 8187044), (20, 4093522), (40, 2046761), (41, 1996840), (82, 998420), (164, 499210), (205, 399368), (328, 249605), (410, 199684), (820, 99842), (1640, 49921)]