20648500

素因数分解:

$2^2\times 5^3\times {\mathrm{61}}^1\times {\mathrm{677}}^1$

素因数の和:757

約数の個数: 48

約数和(自身を含む): 45903312

約数和(自身を除く): 25254812

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 125, 244, 250, 305, 500, 610, 677, 1220, 1354, 1525, 2708, 3050, 3385, 6100, 6770, 7625, 13540, 15250, 16925, 30500, 33850, 41297, 67700, 82594, 84625, 165188, 169250, 206485, 338500, 412970, 825940, 1032425, 2064850, 4129700, 5162125, 10324250, 20648500]

約数ペア:

[(1, 20648500), (2, 10324250), (4, 5162125), (5, 4129700), (10, 2064850), (20, 1032425), (25, 825940), (50, 412970), (61, 338500), (100, 206485), (122, 169250), (125, 165188), (244, 84625), (250, 82594), (305, 67700), (500, 41297), (610, 33850), (677, 30500), (1220, 16925), (1354, 15250), (1525, 13540), (2708, 7625), (3050, 6770), (3385, 6100)]