21659540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1181}}^1$

素因数の和:1328

約数の個数: 48

約数和(自身を含む): 52424064

約数和(自身を除く): 30764524

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 131, 140, 262, 524, 655, 917, 1181, 1310, 1834, 2362, 2620, 3668, 4585, 4724, 5905, 8267, 9170, 11810, 16534, 18340, 23620, 33068, 41335, 82670, 154711, 165340, 309422, 618844, 773555, 1082977, 1547110, 2165954, 3094220, 4331908, 5414885, 10829770, 21659540]

約数ペア:

[(1, 21659540), (2, 10829770), (4, 5414885), (5, 4331908), (7, 3094220), (10, 2165954), (14, 1547110), (20, 1082977), (28, 773555), (35, 618844), (70, 309422), (131, 165340), (140, 154711), (262, 82670), (524, 41335), (655, 33068), (917, 23620), (1181, 18340), (1310, 16534), (1834, 11810), (2362, 9170), (2620, 8267), (3668, 5905), (4585, 4724)]