21789770

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{1571}}^1$

素因数の和:1670

約数の個数: 32

約数和(自身を含む): 41878080

約数和(自身を除く): 20088310

約数列:

[1, 2, 5, 10, 19, 38, 73, 95, 146, 190, 365, 730, 1387, 1571, 2774, 3142, 6935, 7855, 13870, 15710, 29849, 59698, 114683, 149245, 229366, 298490, 573415, 1146830, 2178977, 4357954, 10894885, 21789770]

約数ペア:

[(1, 21789770), (2, 10894885), (5, 4357954), (10, 2178977), (19, 1146830), (38, 573415), (73, 298490), (95, 229366), (146, 149245), (190, 114683), (365, 59698), (730, 29849), (1387, 15710), (1571, 13870), (2774, 7855), (3142, 6935)]