21481744

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78977}}^1$

素因数の和:79002

約数の個数: 20

約数和(自身を含む): 44069724

約数和(自身を除く): 22587980

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78977, 157954, 315908, 631816, 1263632, 1342609, 2685218, 5370436, 10740872, 21481744]

約数ペア:

[(1, 21481744), (2, 10740872), (4, 5370436), (8, 2685218), (16, 1342609), (17, 1263632), (34, 631816), (68, 315908), (136, 157954), (272, 78977)]