21978525

素因数分解:

$3^1\times 5^2\times {\mathrm{131}}^1\times {\mathrm{2237}}^1$

素因数の和:2381

約数の個数: 24

約数和(自身を含む): 36631584

約数和(自身を除く): 14653059

約数列:

[1, 3, 5, 15, 25, 75, 131, 393, 655, 1965, 2237, 3275, 6711, 9825, 11185, 33555, 55925, 167775, 293047, 879141, 1465235, 4395705, 7326175, 21978525]

約数ペア:

[(1, 21978525), (3, 7326175), (5, 4395705), (15, 1465235), (25, 879141), (75, 293047), (131, 167775), (393, 55925), (655, 33555), (1965, 11185), (2237, 9825), (3275, 6711)]