21149004080

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{881}}^1\times {\mathrm{2971}}^1$

素因数の和:3966

約数の個数: 80

約数和(自身を含む): 49731379488

約数和(自身を除く): 28582375408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 881, 1010, 1616, 1762, 2020, 2971, 3524, 4040, 4405, 5942, 7048, 8080, 8810, 11884, 14096, 14855, 17620, 23768, 29710, 35240, 47536, 59420, 70480, 88981, 118840, 177962, 237680, 300071, 355924, 444905, 600142, 711848, 889810, 1200284, 1423696, 1500355, 1779620, 2400568, 2617451, 3000710, 3559240, 4801136, 5234902, 6001420, 7118480, 10469804, 12002840, 13087255, 20939608, 24005680, 26174510, 41879216, 52349020, 104698040, 209396080, 264362551, 528725102, 1057450204, 1321812755, 2114900408, 2643625510, 4229800816, 5287251020, 10574502040, 21149004080]

約数ペア:

[(1, 21149004080), (2, 10574502040), (4, 5287251020), (5, 4229800816), (8, 2643625510), (10, 2114900408), (16, 1321812755), (20, 1057450204), (40, 528725102), (80, 264362551), (101, 209396080), (202, 104698040), (404, 52349020), (505, 41879216), (808, 26174510), (881, 24005680), (1010, 20939608), (1616, 13087255), (1762, 12002840), (2020, 10469804), (2971, 7118480), (3524, 6001420), (4040, 5234902), (4405, 4801136), (5942, 3559240), (7048, 3000710), (8080, 2617451), (8810, 2400568), (11884, 1779620), (14096, 1500355), (14855, 1423696), (17620, 1200284), (23768, 889810), (29710, 711848), (35240, 600142), (47536, 444905), (59420, 355924), (70480, 300071), (88981, 237680), (118840, 177962)]