20672561

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 28957824

約数和(自身を除く): 8285263

約数列:

[1, 7, 13, 17, 23, 49, 83, 91, 119, 161, 221, 299, 391, 581, 637, 833, 1079, 1127, 1411, 1547, 1909, 2093, 2737, 4067, 5083, 7553, 9877, 10829, 13363, 14651, 18343, 19159, 24817, 32453, 35581, 52871, 69139, 93541, 128401, 173719, 227171, 249067, 421889, 898807, 1216033, 1590197, 2953223, 20672561]

約数ペア:

[(1, 20672561), (7, 2953223), (13, 1590197), (17, 1216033), (23, 898807), (49, 421889), (83, 249067), (91, 227171), (119, 173719), (161, 128401), (221, 93541), (299, 69139), (391, 52871), (581, 35581), (637, 32453), (833, 24817), (1079, 19159), (1127, 18343), (1411, 14651), (1547, 13363), (1909, 10829), (2093, 9877), (2737, 7553), (4067, 5083)]