20291220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{811}}^1$

素因数の和:965

約数の個数: 72

約数和(自身を含む): 62069280

約数和(自身を除く): 41778060

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 139, 180, 278, 417, 556, 695, 811, 834, 1251, 1390, 1622, 1668, 2085, 2433, 2502, 2780, 3244, 4055, 4170, 4866, 5004, 6255, 7299, 8110, 8340, 9732, 12165, 12510, 14598, 16220, 24330, 25020, 29196, 36495, 48660, 72990, 112729, 145980, 225458, 338187, 450916, 563645, 676374, 1014561, 1127290, 1352748, 1690935, 2029122, 2254580, 3381870, 4058244, 5072805, 6763740, 10145610, 20291220]

約数ペア:

[(1, 20291220), (2, 10145610), (3, 6763740), (4, 5072805), (5, 4058244), (6, 3381870), (9, 2254580), (10, 2029122), (12, 1690935), (15, 1352748), (18, 1127290), (20, 1014561), (30, 676374), (36, 563645), (45, 450916), (60, 338187), (90, 225458), (139, 145980), (180, 112729), (278, 72990), (417, 48660), (556, 36495), (695, 29196), (811, 25020), (834, 24330), (1251, 16220), (1390, 14598), (1622, 12510), (1668, 12165), (2085, 9732), (2433, 8340), (2502, 8110), (2780, 7299), (3244, 6255), (4055, 5004), (4170, 4866)]