21908019

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{563}}^1$

素因数の和:699

約数の個数: 32

約数和(自身を含む): 35735040

約数和(自身を除く): 13827021

約数列:

[1, 3, 7, 17, 21, 51, 109, 119, 327, 357, 563, 763, 1689, 1853, 2289, 3941, 5559, 9571, 11823, 12971, 28713, 38913, 61367, 66997, 184101, 200991, 429569, 1043239, 1288707, 3129717, 7302673, 21908019]

約数ペア:

[(1, 21908019), (3, 7302673), (7, 3129717), (17, 1288707), (21, 1043239), (51, 429569), (109, 200991), (119, 184101), (327, 66997), (357, 61367), (563, 38913), (763, 28713), (1689, 12971), (1853, 11823), (2289, 9571), (3941, 5559)]