21219961

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{7753}}^1$

素因数の和:7800

約数の個数: 16

約数和(自身を含む): 26797824

約数和(自身を除く): 5577863

約数列:

[1, 7, 17, 23, 119, 161, 391, 2737, 7753, 54271, 131801, 178319, 922607, 1248233, 3031423, 21219961]

約数ペア:

[(1, 21219961), (7, 3031423), (17, 1248233), (23, 922607), (119, 178319), (161, 131801), (391, 54271), (2737, 7753)]