19870318

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{277}}^1$

素因数の和:412

約数の個数: 32

約数和(自身を含む): 33626880

約数和(自身を除く): 13756562

約数列:

[1, 2, 13, 26, 31, 62, 89, 178, 277, 403, 554, 806, 1157, 2314, 2759, 3601, 5518, 7202, 8587, 17174, 24653, 35867, 49306, 71734, 111631, 223262, 320489, 640978, 764243, 1528486, 9935159, 19870318]

約数ペア:

[(1, 19870318), (2, 9935159), (13, 1528486), (26, 764243), (31, 640978), (62, 320489), (89, 223262), (178, 111631), (277, 71734), (403, 49306), (554, 35867), (806, 24653), (1157, 17174), (2314, 8587), (2759, 7202), (3601, 5518)]