21190329

素因数分解:

$3^5\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 34245120

約数和(自身を除く): 13054791

約数列:

[1, 3, 9, 27, 29, 31, 81, 87, 93, 97, 243, 261, 279, 291, 783, 837, 873, 899, 2349, 2511, 2619, 2697, 2813, 3007, 7047, 7533, 7857, 8091, 8439, 9021, 23571, 24273, 25317, 27063, 72819, 75951, 81189, 87203, 218457, 227853, 243567, 261609, 683559, 730701, 784827, 2354481, 7063443, 21190329]

約数ペア:

[(1, 21190329), (3, 7063443), (9, 2354481), (27, 784827), (29, 730701), (31, 683559), (81, 261609), (87, 243567), (93, 227853), (97, 218457), (243, 87203), (261, 81189), (279, 75951), (291, 72819), (783, 27063), (837, 25317), (873, 24273), (899, 23571), (2349, 9021), (2511, 8439), (2619, 8091), (2697, 7857), (2813, 7533), (3007, 7047)]