20548240

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{521}}^1$

素因数の和:580

約数の個数: 80

約数和(自身を含む): 52429680

約数和(自身を除く): 31881440

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 29, 34, 40, 58, 68, 80, 85, 116, 136, 145, 170, 232, 272, 290, 340, 464, 493, 521, 580, 680, 986, 1042, 1160, 1360, 1972, 2084, 2320, 2465, 2605, 3944, 4168, 4930, 5210, 7888, 8336, 8857, 9860, 10420, 15109, 17714, 19720, 20840, 30218, 35428, 39440, 41680, 44285, 60436, 70856, 75545, 88570, 120872, 141712, 151090, 177140, 241744, 256853, 302180, 354280, 513706, 604360, 708560, 1027412, 1208720, 1284265, 2054824, 2568530, 4109648, 5137060, 10274120, 20548240]

約数ペア:

[(1, 20548240), (2, 10274120), (4, 5137060), (5, 4109648), (8, 2568530), (10, 2054824), (16, 1284265), (17, 1208720), (20, 1027412), (29, 708560), (34, 604360), (40, 513706), (58, 354280), (68, 302180), (80, 256853), (85, 241744), (116, 177140), (136, 151090), (145, 141712), (170, 120872), (232, 88570), (272, 75545), (290, 70856), (340, 60436), (464, 44285), (493, 41680), (521, 39440), (580, 35428), (680, 30218), (986, 20840), (1042, 19720), (1160, 17714), (1360, 15109), (1972, 10420), (2084, 9860), (2320, 8857), (2465, 8336), (2605, 7888), (3944, 5210), (4168, 4930)]