21781610

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{75109}}^1$

素因数の和:75145

約数の個数: 16

約数和(自身を含む): 40559400

約数和(自身を除く): 18777790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 75109, 150218, 375545, 751090, 2178161, 4356322, 10890805, 21781610]

約数ペア:

[(1, 21781610), (2, 10890805), (5, 4356322), (10, 2178161), (29, 751090), (58, 375545), (145, 150218), (290, 75109)]