81385745

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{181}}^1\times {\mathrm{443}}^1$

素因数の和:665

約数の個数: 32

約数和(自身を含む): 116363520

約数和(自身を除く): 34977775

約数列:

[1, 5, 7, 29, 35, 145, 181, 203, 443, 905, 1015, 1267, 2215, 3101, 5249, 6335, 12847, 15505, 26245, 36743, 64235, 80183, 89929, 183715, 400915, 449645, 561281, 2325307, 2806405, 11626535, 16277149, 81385745]

約数ペア:

[(1, 81385745), (5, 16277149), (7, 11626535), (29, 2806405), (35, 2325307), (145, 561281), (181, 449645), (203, 400915), (443, 183715), (905, 89929), (1015, 80183), (1267, 64235), (2215, 36743), (3101, 26245), (5249, 15505), (6335, 12847)]