21287305

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{491}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 29756160

約数和(自身を除く): 8468855

約数列:

[1, 5, 13, 23, 29, 65, 115, 145, 299, 377, 491, 667, 1495, 1885, 2455, 3335, 6383, 8671, 11293, 14239, 31915, 43355, 56465, 71195, 146809, 185107, 327497, 734045, 925535, 1637485, 4257461, 21287305]

約数ペア:

[(1, 21287305), (5, 4257461), (13, 1637485), (23, 925535), (29, 734045), (65, 327497), (115, 185107), (145, 146809), (299, 71195), (377, 56465), (491, 43355), (667, 31915), (1495, 14239), (1885, 11293), (2455, 8671), (3335, 6383)]