21542409

素因数分解:

$3^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{857}}^1$

素因数の和:899

約数の個数: 48

約数和(自身を含む): 39124800

約数和(自身を除く): 17582391

約数列:

[1, 3, 7, 9, 19, 21, 27, 49, 57, 63, 133, 147, 171, 189, 399, 441, 513, 857, 931, 1197, 1323, 2571, 2793, 3591, 5999, 7713, 8379, 16283, 17997, 23139, 25137, 41993, 48849, 53991, 113981, 125979, 146547, 161973, 341943, 377937, 439641, 797867, 1025829, 1133811, 2393601, 3077487, 7180803, 21542409]

約数ペア:

[(1, 21542409), (3, 7180803), (7, 3077487), (9, 2393601), (19, 1133811), (21, 1025829), (27, 797867), (49, 439641), (57, 377937), (63, 341943), (133, 161973), (147, 146547), (171, 125979), (189, 113981), (399, 53991), (441, 48849), (513, 41993), (857, 25137), (931, 23139), (1197, 17997), (1323, 16283), (2571, 8379), (2793, 7713), (3591, 5999)]