19927791

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{233}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 33729696

約数和(自身を除く): 13801905

約数列:

[1, 3, 9, 13, 17, 39, 43, 51, 117, 129, 153, 221, 233, 387, 559, 663, 699, 731, 1677, 1989, 2097, 2193, 3029, 3961, 5031, 6579, 9087, 9503, 10019, 11883, 27261, 28509, 30057, 35649, 51493, 85527, 90171, 130247, 154479, 170323, 390741, 463437, 510969, 1172223, 1532907, 2214199, 6642597, 19927791]

約数ペア:

[(1, 19927791), (3, 6642597), (9, 2214199), (13, 1532907), (17, 1172223), (39, 510969), (43, 463437), (51, 390741), (117, 170323), (129, 154479), (153, 130247), (221, 90171), (233, 85527), (387, 51493), (559, 35649), (663, 30057), (699, 28509), (731, 27261), (1677, 11883), (1989, 10019), (2097, 9503), (2193, 9087), (3029, 6579), (3961, 5031)]