21660385

素因数分解:

$5^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1\times {\mathrm{307}}^1$

素因数の和:552

約数の個数: 16

約数和(自身を含む): 26522496

約数和(自身を除く): 4862111

約数列:

[1, 5, 103, 137, 307, 515, 685, 1535, 14111, 31621, 42059, 70555, 158105, 210295, 4332077, 21660385]

約数ペア:

[(1, 21660385), (5, 4332077), (103, 210295), (137, 158105), (307, 70555), (515, 42059), (685, 31621), (1535, 14111)]