21356396

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{1097}}^1$

素因数の和:1289

約数の個数: 24

約数和(自身を含む): 38860416

約数和(自身を除く): 17504020

約数列:

[1, 2, 4, 31, 62, 124, 157, 314, 628, 1097, 2194, 4388, 4867, 9734, 19468, 34007, 68014, 136028, 172229, 344458, 688916, 5339099, 10678198, 21356396]

約数ペア:

[(1, 21356396), (2, 10678198), (4, 5339099), (31, 688916), (62, 344458), (124, 172229), (157, 136028), (314, 68014), (628, 34007), (1097, 19468), (2194, 9734), (4388, 4867)]