19966886471

素因数分解:

$7^4\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:254

約数の個数: 80

約数和(自身を含む): 25156565280

約数和(自身を除く): 5189678809

約数列:

[1, 7, 41, 43, 49, 53, 89, 287, 301, 343, 371, 623, 1763, 2009, 2107, 2173, 2279, 2401, 2597, 3649, 3827, 4361, 4717, 12341, 14063, 14749, 15211, 15953, 18179, 25543, 26789, 30527, 33019, 86387, 93439, 98441, 103243, 106477, 111671, 127253, 156907, 178801, 187523, 193397, 202831, 213689, 231133, 604709, 654073, 745339, 781697, 1098349, 1251607, 1312661, 1353779, 1419817, 1617931, 4232963, 4578511, 5217373, 5471879, 7688443, 8316071, 8761249, 9188627, 9476453, 9938719, 11325517, 32049577, 53819101, 58212497, 66335171, 69571033, 224347039, 376733707, 407487479, 464346197, 486997231, 2852412353, 19966886471]

約数ペア:

[(1, 19966886471), (7, 2852412353), (41, 486997231), (43, 464346197), (49, 407487479), (53, 376733707), (89, 224347039), (287, 69571033), (301, 66335171), (343, 58212497), (371, 53819101), (623, 32049577), (1763, 11325517), (2009, 9938719), (2107, 9476453), (2173, 9188627), (2279, 8761249), (2401, 8316071), (2597, 7688443), (3649, 5471879), (3827, 5217373), (4361, 4578511), (4717, 4232963), (12341, 1617931), (14063, 1419817), (14749, 1353779), (15211, 1312661), (15953, 1251607), (18179, 1098349), (25543, 781697), (26789, 745339), (30527, 654073), (33019, 604709), (86387, 231133), (93439, 213689), (98441, 202831), (103243, 193397), (106477, 187523), (111671, 178801), (127253, 156907)]