20281245

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{263}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 33530112

約数和(自身を除く): 13248867

約数列:

[1, 3, 5, 15, 53, 97, 159, 263, 265, 291, 485, 789, 795, 1315, 1455, 3945, 5141, 13939, 15423, 25511, 25705, 41817, 69695, 76533, 77115, 127555, 209085, 382665, 1352083, 4056249, 6760415, 20281245]

約数ペア:

[(1, 20281245), (3, 6760415), (5, 4056249), (15, 1352083), (53, 382665), (97, 209085), (159, 127555), (263, 77115), (265, 76533), (291, 69695), (485, 41817), (789, 25705), (795, 25511), (1315, 15423), (1455, 13939), (3945, 5141)]