256940

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{443}}^1$

素因数の和:481

約数の個数: 24

約数和(自身を含む): 559440

約数和(自身を除く): 302500

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 443, 580, 886, 1772, 2215, 4430, 8860, 12847, 25694, 51388, 64235, 128470, 256940]

約数ペア:

[(1, 256940), (2, 128470), (4, 64235), (5, 51388), (10, 25694), (20, 12847), (29, 8860), (58, 4430), (116, 2215), (145, 1772), (290, 886), (443, 580)]