21054621

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{18917}}^1$

素因数の和:18980

約数の個数: 16

約数和(自身を含む): 32690304

約数和(自身を除く): 11635683

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 18917, 56751, 132419, 397257, 1002601, 3007803, 7018207, 21054621]

約数ペア:

[(1, 21054621), (3, 7018207), (7, 3007803), (21, 1002601), (53, 397257), (159, 132419), (371, 56751), (1113, 18917)]