21057897

素因数分解:

$3^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{4621}}^1$

素因数の和:4669

約数の個数: 24

約数和(自身を含む): 33722112

約数和(自身を除く): 12664215

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 651, 1519, 4557, 4621, 13863, 32347, 97041, 143251, 226429, 429753, 679287, 1002757, 3008271, 7019299, 21057897]

約数ペア:

[(1, 21057897), (3, 7019299), (7, 3008271), (21, 1002757), (31, 679287), (49, 429753), (93, 226429), (147, 143251), (217, 97041), (651, 32347), (1519, 13863), (4557, 4621)]