21678657

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7219}}^1$

素因数の和:7253

約数の個数: 32

約数和(自身を含む): 38814720

約数和(自身を除く): 17136063

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 77, 91, 143, 231, 273, 429, 1001, 3003, 7219, 21657, 50533, 79409, 93847, 151599, 238227, 281541, 555863, 656929, 1032317, 1667589, 1970787, 3096951, 7226219, 21678657]

約数ペア:

[(1, 21678657), (3, 7226219), (7, 3096951), (11, 1970787), (13, 1667589), (21, 1032317), (33, 656929), (39, 555863), (77, 281541), (91, 238227), (143, 151599), (231, 93847), (273, 79409), (429, 50533), (1001, 21657), (3003, 7219)]