20448760

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 47952000

約数和(自身を除く): 27503240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 73, 94, 146, 149, 188, 235, 292, 298, 365, 376, 470, 584, 596, 730, 745, 940, 1192, 1460, 1490, 1880, 2920, 2980, 3431, 5960, 6862, 7003, 10877, 13724, 14006, 17155, 21754, 27448, 28012, 34310, 35015, 43508, 54385, 56024, 68620, 70030, 87016, 108770, 137240, 140060, 217540, 280120, 435080, 511219, 1022438, 2044876, 2556095, 4089752, 5112190, 10224380, 20448760]

約数ペア:

[(1, 20448760), (2, 10224380), (4, 5112190), (5, 4089752), (8, 2556095), (10, 2044876), (20, 1022438), (40, 511219), (47, 435080), (73, 280120), (94, 217540), (146, 140060), (149, 137240), (188, 108770), (235, 87016), (292, 70030), (298, 68620), (365, 56024), (376, 54385), (470, 43508), (584, 35015), (596, 34310), (730, 28012), (745, 27448), (940, 21754), (1192, 17155), (1460, 14006), (1490, 13724), (1880, 10877), (2920, 7003), (2980, 6862), (3431, 5960)]