21001808

素因数分解:

$2^4\times {\mathrm{73}}^1\times {\mathrm{17981}}^1$

素因数の和:18062

約数の個数: 20

約数和(自身を含む): 41250708

約数和(自身を除く): 20248900

約数列:

[1, 2, 4, 8, 16, 73, 146, 292, 584, 1168, 17981, 35962, 71924, 143848, 287696, 1312613, 2625226, 5250452, 10500904, 21001808]

約数ペア:

[(1, 21001808), (2, 10500904), (4, 5250452), (8, 2625226), (16, 1312613), (73, 287696), (146, 143848), (292, 71924), (584, 35962), (1168, 17981)]