21095991

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^2\times {\mathrm{211}}^1$

素因数の和:273

約数の個数: 48

約数和(自身を含む): 37515520

約数和(自身を除く): 16419529

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 161, 189, 207, 211, 483, 529, 621, 633, 1449, 1477, 1587, 1899, 3703, 4347, 4431, 4761, 4853, 5697, 11109, 13293, 14283, 14559, 33327, 33971, 39879, 43677, 99981, 101913, 111619, 131031, 305739, 334857, 781333, 917217, 1004571, 2343999, 3013713, 7031997, 21095991]

約数ペア:

[(1, 21095991), (3, 7031997), (7, 3013713), (9, 2343999), (21, 1004571), (23, 917217), (27, 781333), (63, 334857), (69, 305739), (161, 131031), (189, 111619), (207, 101913), (211, 99981), (483, 43677), (529, 39879), (621, 33971), (633, 33327), (1449, 14559), (1477, 14283), (1587, 13293), (1899, 11109), (3703, 5697), (4347, 4853), (4431, 4761)]