81640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1$

素因数の和:181

約数の個数: 32

約数和(自身を含む): 199080

約数和(自身を除く): 117440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 157, 260, 314, 520, 628, 785, 1256, 1570, 2041, 3140, 4082, 6280, 8164, 10205, 16328, 20410, 40820, 81640]

約数ペア:

[(1, 81640), (2, 40820), (4, 20410), (5, 16328), (8, 10205), (10, 8164), (13, 6280), (20, 4082), (26, 3140), (40, 2041), (52, 1570), (65, 1256), (104, 785), (130, 628), (157, 520), (260, 314)]