21420028

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{12541}}^1$

素因数の和:12613

約数の個数: 24

約数和(自身を含む): 43545824

約数和(自身を除く): 22125796

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 12541, 25082, 50164, 87787, 175574, 351148, 765001, 1530002, 3060004, 5355007, 10710014, 21420028]

約数ペア:

[(1, 21420028), (2, 10710014), (4, 5355007), (7, 3060004), (14, 1530002), (28, 765001), (61, 351148), (122, 175574), (244, 87787), (427, 50164), (854, 25082), (1708, 12541)]