21506031

素因数分解:

$3^2\times {\mathrm{59}}^1\times {\mathrm{101}}^1\times {\mathrm{401}}^1$

素因数の和:567

約数の個数: 24

約数和(自身を含む): 31983120

約数和(自身を除く): 10477089

約数列:

[1, 3, 9, 59, 101, 177, 303, 401, 531, 909, 1203, 3609, 5959, 17877, 23659, 40501, 53631, 70977, 121503, 212931, 364509, 2389559, 7168677, 21506031]

約数ペア:

[(1, 21506031), (3, 7168677), (9, 2389559), (59, 364509), (101, 212931), (177, 121503), (303, 70977), (401, 53631), (531, 40501), (909, 23659), (1203, 17877), (3609, 5959)]