21684945

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{277}}^1\times {\mathrm{307}}^1$

素因数の和:609

約数の個数: 32

約数和(自身を含む): 36989568

約数和(自身を除く): 15304623

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 277, 307, 831, 921, 1385, 1535, 4155, 4605, 4709, 5219, 14127, 15657, 23545, 26095, 70635, 78285, 85039, 255117, 425195, 1275585, 1445663, 4336989, 7228315, 21684945]

約数ペア:

[(1, 21684945), (3, 7228315), (5, 4336989), (15, 1445663), (17, 1275585), (51, 425195), (85, 255117), (255, 85039), (277, 78285), (307, 70635), (831, 26095), (921, 23545), (1385, 15657), (1535, 14127), (4155, 5219), (4605, 4709)]