21158151

素因数分解:

$3^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{4643}}^1$

素因数の和:4691

約数の個数: 24

約数和(自身を含む): 33882624

約数和(自身を除く): 12724473

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 651, 1519, 4557, 4643, 13929, 32501, 97503, 143933, 227507, 431799, 682521, 1007531, 3022593, 7052717, 21158151]

約数ペア:

[(1, 21158151), (3, 7052717), (7, 3022593), (21, 1007531), (31, 682521), (49, 431799), (93, 227507), (147, 143933), (217, 97503), (651, 32501), (1519, 13929), (4557, 4643)]