21491361

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{47}}^3$

素因数の和:170

約数の個数: 24

約数和(自身を含む): 33096960

約数和(自身を除く): 11605599

約数列:

[1, 3, 9, 23, 47, 69, 141, 207, 423, 1081, 2209, 3243, 6627, 9729, 19881, 50807, 103823, 152421, 311469, 457263, 934407, 2387929, 7163787, 21491361]

約数ペア:

[(1, 21491361), (3, 7163787), (9, 2387929), (23, 934407), (47, 457263), (69, 311469), (141, 152421), (207, 103823), (423, 50807), (1081, 19881), (2209, 9729), (3243, 6627)]