21221758

素因数分解:

$2^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1\times {\mathrm{751}}^1$

素因数の和:1023

約数の個数: 16

約数和(自身を含む): 32486400

約数和(自身を除く): 11264642

約数列:

[1, 2, 71, 142, 199, 398, 751, 1502, 14129, 28258, 53321, 106642, 149449, 298898, 10610879, 21221758]

約数ペア:

[(1, 21221758), (2, 10610879), (71, 298898), (142, 149449), (199, 106642), (398, 53321), (751, 28258), (1502, 14129)]