31688540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{397}}^1$

素因数の和:726

約数の個数: 48

約数和(自身を含む): 72079392

約数和(自身を除く): 40390852

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 307, 397, 614, 794, 1228, 1535, 1588, 1985, 3070, 3970, 3991, 5161, 6140, 7940, 7982, 10322, 15964, 19955, 20644, 25805, 39910, 51610, 79820, 103220, 121879, 243758, 487516, 609395, 1218790, 1584427, 2437580, 3168854, 6337708, 7922135, 15844270, 31688540]

約数ペア:

[(1, 31688540), (2, 15844270), (4, 7922135), (5, 6337708), (10, 3168854), (13, 2437580), (20, 1584427), (26, 1218790), (52, 609395), (65, 487516), (130, 243758), (260, 121879), (307, 103220), (397, 79820), (614, 51610), (794, 39910), (1228, 25805), (1535, 20644), (1588, 19955), (1985, 15964), (3070, 10322), (3970, 7982), (3991, 7940), (5161, 6140)]