20185557

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{307}}^1$

素因数の和:449

約数の個数: 32

約数和(自身を含む): 32169984

約数和(自身を除く): 11984427

約数列:

[1, 3, 7, 21, 31, 93, 101, 217, 303, 307, 651, 707, 921, 2121, 2149, 3131, 6447, 9393, 9517, 21917, 28551, 31007, 65751, 66619, 93021, 199857, 217049, 651147, 961217, 2883651, 6728519, 20185557]

約数ペア:

[(1, 20185557), (3, 6728519), (7, 2883651), (21, 961217), (31, 651147), (93, 217049), (101, 199857), (217, 93021), (303, 66619), (307, 65751), (651, 31007), (707, 28551), (921, 21917), (2121, 9517), (2149, 9393), (3131, 6447)]