21209703

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{2063}}^1$

素因数の和:2238

約数の個数: 16

約数和(自身を含む): 29721600

約数和(自身を除く): 8511897

約数列:

[1, 3, 23, 69, 149, 447, 2063, 3427, 6189, 10281, 47449, 142347, 307387, 922161, 7069901, 21209703]

約数ペア:

[(1, 21209703), (3, 7069901), (23, 922161), (69, 307387), (149, 142347), (447, 47449), (2063, 10281), (3427, 6189)]