21540148

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2131}}^1$

素因数の和:2180

約数の個数: 36

約数和(自身を含む): 45488352

約数和(自身を除く): 23948204

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 361, 532, 722, 1444, 2131, 2527, 4262, 5054, 8524, 10108, 14917, 29834, 40489, 59668, 80978, 161956, 283423, 566846, 769291, 1133692, 1538582, 3077164, 5385037, 10770074, 21540148]

約数ペア:

[(1, 21540148), (2, 10770074), (4, 5385037), (7, 3077164), (14, 1538582), (19, 1133692), (28, 769291), (38, 566846), (76, 283423), (133, 161956), (266, 80978), (361, 59668), (532, 40489), (722, 29834), (1444, 14917), (2131, 10108), (2527, 8524), (4262, 5054)]