20541420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{821}}^1$

素因数の和:975

約数の個数: 72

約数和(自身を含む): 62833680

約数和(自身を除く): 42292260

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, 821, 834, 1251, 1390, 1642, 1668, 2085, 2463, 2502, 2780, 3284, 4105, 4170, 4926, 5004, 6255, 7389, 8210, 8340, 9852, 12315, 12510, 14778, 16420, 24630, 25020, 29556, 36945, 49260, 73890, 114119, 147780, 228238, 342357, 456476, 570595, 684714, 1027071, 1141190, 1369428, 1711785, 2054142, 2282380, 3423570, 4108284, 5135355, 6847140, 10270710, 20541420]

約数ペア:

[(1, 20541420), (2, 10270710), (3, 6847140), (4, 5135355), (5, 4108284), (6, 3423570), (9, 2282380), (10, 2054142), (12, 1711785), (15, 1369428), (18, 1141190), (20, 1027071), (30, 684714), (36, 570595), (45, 456476), (60, 342357), (90, 228238), (139, 147780), (180, 114119), (278, 73890), (417, 49260), (556, 36945), (695, 29556), (821, 25020), (834, 24630), (1251, 16420), (1390, 14778), (1642, 12510), (1668, 12315), (2085, 9852), (2463, 8340), (2502, 8210), (2780, 7389), (3284, 6255), (4105, 5004), (4170, 4926)]