657040

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{191}}^1$

素因数の和:247

約数の個数: 40

約数和(自身を含む): 1571328

約数和(自身を除く): 914288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 191, 215, 344, 382, 430, 688, 764, 860, 955, 1528, 1720, 1910, 3056, 3440, 3820, 7640, 8213, 15280, 16426, 32852, 41065, 65704, 82130, 131408, 164260, 328520, 657040]

約数ペア:

[(1, 657040), (2, 328520), (4, 164260), (5, 131408), (8, 82130), (10, 65704), (16, 41065), (20, 32852), (40, 16426), (43, 15280), (80, 8213), (86, 7640), (172, 3820), (191, 3440), (215, 3056), (344, 1910), (382, 1720), (430, 1528), (688, 955), (764, 860)]