18311990

素因数分解:

$2^1\times 5^1\times {\mathrm{457}}^1\times {\mathrm{4007}}^1$

素因数の和:4471

約数の個数: 16

約数和(自身を含む): 33041952

約数和(自身を除く): 14729962

約数列:

[1, 2, 5, 10, 457, 914, 2285, 4007, 4570, 8014, 20035, 40070, 1831199, 3662398, 9155995, 18311990]

約数ペア:

[(1, 18311990), (2, 9155995), (5, 3662398), (10, 1831199), (457, 40070), (914, 20035), (2285, 8014), (4007, 4570)]