21155911

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{2179}}^1$

素因数の和:2278

約数の個数: 16

約数和(自身を含む): 25811200

約数和(自身を除く): 4655289

約数列:

[1, 7, 19, 73, 133, 511, 1387, 2179, 9709, 15253, 41401, 159067, 289807, 1113469, 3022273, 21155911]

約数ペア:

[(1, 21155911), (7, 3022273), (19, 1113469), (73, 289807), (133, 159067), (511, 41401), (1387, 15253), (2179, 9709)]