12840321

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{181}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 19813248

約数和(自身を除く): 6972927

約数列:

[1, 3, 13, 17, 39, 51, 107, 181, 221, 321, 543, 663, 1391, 1819, 2353, 3077, 4173, 5457, 7059, 9231, 19367, 23647, 40001, 58101, 70941, 120003, 251771, 329239, 755313, 987717, 4280107, 12840321]

約数ペア:

[(1, 12840321), (3, 4280107), (13, 987717), (17, 755313), (39, 329239), (51, 251771), (107, 120003), (181, 70941), (221, 58101), (321, 40001), (543, 23647), (663, 19367), (1391, 9231), (1819, 7059), (2353, 5457), (3077, 4173)]