20721085

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{503}}^1$

素因数の和:633

約数の個数: 32

約数和(自身を含む): 31352832

約数和(自身を除く): 10631747

約数列:

[1, 5, 7, 11, 35, 55, 77, 107, 385, 503, 535, 749, 1177, 2515, 3521, 3745, 5533, 5885, 8239, 17605, 27665, 38731, 41195, 53821, 193655, 269105, 376747, 592031, 1883735, 2960155, 4144217, 20721085]

約数ペア:

[(1, 20721085), (5, 4144217), (7, 2960155), (11, 1883735), (35, 592031), (55, 376747), (77, 269105), (107, 193655), (385, 53821), (503, 41195), (535, 38731), (749, 27665), (1177, 17605), (2515, 8239), (3521, 5885), (3745, 5533)]