21839390

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{128467}}^1$

素因数の和:128491

約数の個数: 16

約数和(自身を含む): 41623632

約数和(自身を除く): 19784242

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 128467, 256934, 642335, 1284670, 2183939, 4367878, 10919695, 21839390]

約数ペア:

[(1, 21839390), (2, 10919695), (5, 4367878), (10, 2183939), (17, 1284670), (34, 642335), (85, 256934), (170, 128467)]