21216020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21649}}^1$

素因数の和:21672

約数の個数: 36

約数和(自身を含む): 51830100

約数和(自身を除く): 30614080

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21649, 43298, 86596, 108245, 151543, 216490, 303086, 432980, 606172, 757715, 1060801, 1515430, 2121602, 3030860, 4243204, 5304005, 10608010, 21216020]

約数ペア:

[(1, 21216020), (2, 10608010), (4, 5304005), (5, 4243204), (7, 3030860), (10, 2121602), (14, 1515430), (20, 1060801), (28, 757715), (35, 606172), (49, 432980), (70, 303086), (98, 216490), (140, 151543), (196, 108245), (245, 86596), (490, 43298), (980, 21649)]