21109538

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{7523}}^1$

素因数の和:7609

約数の個数: 16

約数和(自身を含む): 33587136

約数和(自身を除く): 12477598

約数列:

[1, 2, 23, 46, 61, 122, 1403, 2806, 7523, 15046, 173029, 346058, 458903, 917806, 10554769, 21109538]

約数ペア:

[(1, 21109538), (2, 10554769), (23, 917806), (46, 458903), (61, 346058), (122, 173029), (1403, 15046), (2806, 7523)]