66913640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{40801}}^1$

素因数の和:40853

約数の個数: 32

約数和(自身を含む): 154231560

約数和(自身を除く): 87317920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 40801, 81602, 163204, 204005, 326408, 408010, 816020, 1632040, 1672841, 3345682, 6691364, 8364205, 13382728, 16728410, 33456820, 66913640]

約数ペア:

[(1, 66913640), (2, 33456820), (4, 16728410), (5, 13382728), (8, 8364205), (10, 6691364), (20, 3345682), (40, 1672841), (41, 1632040), (82, 816020), (164, 408010), (205, 326408), (328, 204005), (410, 163204), (820, 81602), (1640, 40801)]