21590905

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{26821}}^1$

素因数の和:26856

約数の個数: 16

約数和(自身を含む): 30898944

約数和(自身を除く): 9308039

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 26821, 134105, 187747, 616883, 938735, 3084415, 4318181, 21590905]

約数ペア:

[(1, 21590905), (5, 4318181), (7, 3084415), (23, 938735), (35, 616883), (115, 187747), (161, 134105), (805, 26821)]