21209745

素因数分解:

$3^1\times 5^1\times {\mathrm{227}}^1\times {\mathrm{6229}}^1$

素因数の和:6464

約数の個数: 16

約数和(自身を含む): 34090560

約数和(自身を除く): 12880815

約数列:

[1, 3, 5, 15, 227, 681, 1135, 3405, 6229, 18687, 31145, 93435, 1413983, 4241949, 7069915, 21209745]

約数ペア:

[(1, 21209745), (3, 7069915), (5, 4241949), (15, 1413983), (227, 93435), (681, 31145), (1135, 18687), (3405, 6229)]