64310140

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{78427}}^1$

素因数の和:78477

約数の個数: 24

約数和(自身を含む): 138346992

約数和(自身を除く): 74036852

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 78427, 156854, 313708, 392135, 784270, 1568540, 3215507, 6431014, 12862028, 16077535, 32155070, 64310140]

約数ペア:

[(1, 64310140), (2, 32155070), (4, 16077535), (5, 12862028), (10, 6431014), (20, 3215507), (41, 1568540), (82, 784270), (164, 392135), (205, 313708), (410, 156854), (820, 78427)]