19980905

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{24821}}^1$

素因数の和:24856

約数の個数: 16

約数和(自身を含む): 28594944

約数和(自身を除く): 8614039

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 24821, 124105, 173747, 570883, 868735, 2854415, 3996181, 19980905]

約数ペア:

[(1, 19980905), (5, 3996181), (7, 2854415), (23, 868735), (35, 570883), (115, 173747), (161, 124105), (805, 24821)]