21152020

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{36469}}^1$

素因数の和:36507

約数の個数: 24

約数和(自身を含む): 45952200

約数和(自身を除く): 24800180

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 36469, 72938, 145876, 182345, 364690, 729380, 1057601, 2115202, 4230404, 5288005, 10576010, 21152020]

約数ペア:

[(1, 21152020), (2, 10576010), (4, 5288005), (5, 4230404), (10, 2115202), (20, 1057601), (29, 729380), (58, 364690), (116, 182345), (145, 145876), (290, 72938), (580, 36469)]