20513740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{307}}^1$

素因数の和:586

約数の個数: 48

約数和(自身を含む): 46724832

約数和(自身を除く): 26211092

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 257, 260, 307, 514, 614, 1028, 1228, 1285, 1535, 2570, 3070, 3341, 3991, 5140, 6140, 6682, 7982, 13364, 15964, 16705, 19955, 33410, 39910, 66820, 78899, 79820, 157798, 315596, 394495, 788990, 1025687, 1577980, 2051374, 4102748, 5128435, 10256870, 20513740]

約数ペア:

[(1, 20513740), (2, 10256870), (4, 5128435), (5, 4102748), (10, 2051374), (13, 1577980), (20, 1025687), (26, 788990), (52, 394495), (65, 315596), (130, 157798), (257, 79820), (260, 78899), (307, 66820), (514, 39910), (614, 33410), (1028, 19955), (1228, 16705), (1285, 15964), (1535, 13364), (2570, 7982), (3070, 6682), (3341, 6140), (3991, 5140)]