18899780

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{3677}}^1$

素因数の和:3943

約数の個数: 24

約数和(自身を含む): 39854808

約数和(自身を除く): 20955028

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 3677, 5140, 7354, 14708, 18385, 36770, 73540, 944989, 1889978, 3779956, 4724945, 9449890, 18899780]

約数ペア:

[(1, 18899780), (2, 9449890), (4, 4724945), (5, 3779956), (10, 1889978), (20, 944989), (257, 73540), (514, 36770), (1028, 18385), (1285, 14708), (2570, 7354), (3677, 5140)]