21286895

素因数分解:

$5^1\times 7^1\times {\mathrm{739}}^1\times {\mathrm{823}}^1$

素因数の和:1574

約数の個数: 16

約数和(自身を含む): 29268480

約数和(自身を除く): 7981585

約数列:

[1, 5, 7, 35, 739, 823, 3695, 4115, 5173, 5761, 25865, 28805, 608197, 3040985, 4257379, 21286895]

約数ペア:

[(1, 21286895), (5, 4257379), (7, 3040985), (35, 608197), (739, 28805), (823, 25865), (3695, 5761), (4115, 5173)]