21349881

素因数分解:

$3^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{2999}}^1$

素因数の和:3125

約数の個数: 24

約数和(自身を含む): 35568000

約数和(自身を除く): 14218119

約数列:

[1, 3, 7, 9, 21, 63, 113, 339, 791, 1017, 2373, 2999, 7119, 8997, 20993, 26991, 62979, 188937, 338887, 1016661, 2372209, 3049983, 7116627, 21349881]

約数ペア:

[(1, 21349881), (3, 7116627), (7, 3049983), (9, 2372209), (21, 1016661), (63, 338887), (113, 188937), (339, 62979), (791, 26991), (1017, 20993), (2373, 8997), (2999, 7119)]