21000813

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{263}}^1\times {\mathrm{619}}^1$

素因数の和:928

約数の個数: 16

約数和(自身を含む): 28807680

約数和(自身を除く): 7806867

約数列:

[1, 3, 43, 129, 263, 619, 789, 1857, 11309, 26617, 33927, 79851, 162797, 488391, 7000271, 21000813]

約数ペア:

[(1, 21000813), (3, 7000271), (43, 488391), (129, 162797), (263, 79851), (619, 33927), (789, 26617), (1857, 11309)]