31117640

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1559}}^1$

素因数の和:2069

約数の個数: 32

約数和(自身を含む): 70200000

約数和(自身を除く): 39082360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1559, 1996, 2495, 3118, 3992, 4990, 6236, 7795, 9980, 12472, 15590, 19960, 31180, 62360, 777941, 1555882, 3111764, 3889705, 6223528, 7779410, 15558820, 31117640]

約数ペア:

[(1, 31117640), (2, 15558820), (4, 7779410), (5, 6223528), (8, 3889705), (10, 3111764), (20, 1555882), (40, 777941), (499, 62360), (998, 31180), (1559, 19960), (1996, 15590), (2495, 12472), (3118, 9980), (3992, 7795), (4990, 6236)]