21190705

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{1789}}^1$

素因数の和:1920

約数の個数: 16

約数和(自身を含む): 26807040

約数和(自身を除く): 5616335

約数列:

[1, 5, 23, 103, 115, 515, 1789, 2369, 8945, 11845, 41147, 184267, 205735, 921335, 4238141, 21190705]

約数ペア:

[(1, 21190705), (5, 4238141), (23, 921335), (103, 205735), (115, 184267), (515, 41147), (1789, 11845), (2369, 8945)]