21250721

素因数分解:

${\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{449}}^1$

素因数の和:568

約数の個数: 16

約数和(自身を含む): 23328000

約数和(自身を除く): 2077279

約数列:

[1, 19, 47, 53, 449, 893, 1007, 2491, 8531, 21103, 23797, 47329, 400957, 452143, 1118459, 21250721]

約数ペア:

[(1, 21250721), (19, 1118459), (47, 452143), (53, 400957), (449, 47329), (893, 23797), (1007, 21103), (2491, 8531)]