21080680

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{1069}}^1$

素因数の和:1126

約数の個数: 64

約数和(自身を含む): 52002000

約数和(自身を除く): 30921320

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 29, 34, 40, 58, 68, 85, 116, 136, 145, 170, 232, 290, 340, 493, 580, 680, 986, 1069, 1160, 1972, 2138, 2465, 3944, 4276, 4930, 5345, 8552, 9860, 10690, 18173, 19720, 21380, 31001, 36346, 42760, 62002, 72692, 90865, 124004, 145384, 155005, 181730, 248008, 310010, 363460, 527017, 620020, 726920, 1054034, 1240040, 2108068, 2635085, 4216136, 5270170, 10540340, 21080680]

約数ペア:

[(1, 21080680), (2, 10540340), (4, 5270170), (5, 4216136), (8, 2635085), (10, 2108068), (17, 1240040), (20, 1054034), (29, 726920), (34, 620020), (40, 527017), (58, 363460), (68, 310010), (85, 248008), (116, 181730), (136, 155005), (145, 145384), (170, 124004), (232, 90865), (290, 72692), (340, 62002), (493, 42760), (580, 36346), (680, 31001), (986, 21380), (1069, 19720), (1160, 18173), (1972, 10690), (2138, 9860), (2465, 8552), (3944, 5345), (4276, 4930)]