20689120

素因数分解:

$2^5\times 5^1\times {\mathrm{191}}^1\times {\mathrm{677}}^1$

素因数の和:883

約数の個数: 48

約数和(自身を含む): 49206528

約数和(自身を除く): 28517408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 191, 382, 677, 764, 955, 1354, 1528, 1910, 2708, 3056, 3385, 3820, 5416, 6112, 6770, 7640, 10832, 13540, 15280, 21664, 27080, 30560, 54160, 108320, 129307, 258614, 517228, 646535, 1034456, 1293070, 2068912, 2586140, 4137824, 5172280, 10344560, 20689120]

約数ペア:

[(1, 20689120), (2, 10344560), (4, 5172280), (5, 4137824), (8, 2586140), (10, 2068912), (16, 1293070), (20, 1034456), (32, 646535), (40, 517228), (80, 258614), (160, 129307), (191, 108320), (382, 54160), (677, 30560), (764, 27080), (955, 21664), (1354, 15280), (1528, 13540), (1910, 10832), (2708, 7640), (3056, 6770), (3385, 6112), (3820, 5416)]