80722720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^2$

素因数の和:422

約数の個数: 72

約数和(自身を含む): 206425044

約数和(自身を除く): 125702324

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 197, 208, 260, 394, 416, 520, 788, 985, 1040, 1576, 1970, 2080, 2561, 3152, 3940, 5122, 6304, 7880, 10244, 12805, 15760, 20488, 25610, 31520, 38809, 40976, 51220, 77618, 81952, 102440, 155236, 194045, 204880, 310472, 388090, 409760, 504517, 620944, 776180, 1009034, 1241888, 1552360, 2018068, 2522585, 3104720, 4036136, 5045170, 6209440, 8072272, 10090340, 16144544, 20180680, 40361360, 80722720]

約数ペア:

[(1, 80722720), (2, 40361360), (4, 20180680), (5, 16144544), (8, 10090340), (10, 8072272), (13, 6209440), (16, 5045170), (20, 4036136), (26, 3104720), (32, 2522585), (40, 2018068), (52, 1552360), (65, 1241888), (80, 1009034), (104, 776180), (130, 620944), (160, 504517), (197, 409760), (208, 388090), (260, 310472), (394, 204880), (416, 194045), (520, 155236), (788, 102440), (985, 81952), (1040, 77618), (1576, 51220), (1970, 40976), (2080, 38809), (2561, 31520), (3152, 25610), (3940, 20488), (5122, 15760), (6304, 12805), (7880, 10244)]