21421515

素因数分解:

$3^1\times 5^1\times {\mathrm{881}}^1\times {\mathrm{1621}}^1$

素因数の和:2510

約数の個数: 16

約数和(自身を含む): 34334496

約数和(自身を除く): 12912981

約数列:

[1, 3, 5, 15, 881, 1621, 2643, 4405, 4863, 8105, 13215, 24315, 1428101, 4284303, 7140505, 21421515]

約数ペア:

[(1, 21421515), (3, 7140505), (5, 4284303), (15, 1428101), (881, 24315), (1621, 13215), (2643, 8105), (4405, 4863)]