21313812

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{431}}^1$

素因数の和:768

約数の個数: 48

約数和(自身を含む): 53851392

約数和(自身を除く): 32537580

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 317, 431, 634, 862, 951, 1268, 1293, 1724, 1902, 2586, 3804, 4121, 5172, 5603, 8242, 11206, 12363, 16484, 16809, 22412, 24726, 33618, 49452, 67236, 136627, 273254, 409881, 546508, 819762, 1639524, 1776151, 3552302, 5328453, 7104604, 10656906, 21313812]

約数ペア:

[(1, 21313812), (2, 10656906), (3, 7104604), (4, 5328453), (6, 3552302), (12, 1776151), (13, 1639524), (26, 819762), (39, 546508), (52, 409881), (78, 273254), (156, 136627), (317, 67236), (431, 49452), (634, 33618), (862, 24726), (951, 22412), (1268, 16809), (1293, 16484), (1724, 12363), (1902, 11206), (2586, 8242), (3804, 5603), (4121, 5172)]