21498860

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{367}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 47295360

約数和(自身を除く): 25796500

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 101, 116, 145, 202, 290, 367, 404, 505, 580, 734, 1010, 1468, 1835, 2020, 2929, 3670, 5858, 7340, 10643, 11716, 14645, 21286, 29290, 37067, 42572, 53215, 58580, 74134, 106430, 148268, 185335, 212860, 370670, 741340, 1074943, 2149886, 4299772, 5374715, 10749430, 21498860]

約数ペア:

[(1, 21498860), (2, 10749430), (4, 5374715), (5, 4299772), (10, 2149886), (20, 1074943), (29, 741340), (58, 370670), (101, 212860), (116, 185335), (145, 148268), (202, 106430), (290, 74134), (367, 58580), (404, 53215), (505, 42572), (580, 37067), (734, 29290), (1010, 21286), (1468, 14645), (1835, 11716), (2020, 10643), (2929, 7340), (3670, 5858)]