21000485080

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{2411}}^1\times {\mathrm{3067}}^1$

素因数の和:5560

約数の個数: 64

約数和(自身を含む): 47952103680

約数和(自身を除く): 26951618600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2411, 2840, 3067, 4822, 6134, 9644, 12055, 12268, 15335, 19288, 24110, 24536, 30670, 48220, 61340, 96440, 122680, 171181, 217757, 342362, 435514, 684724, 855905, 871028, 1088785, 1369448, 1711810, 1742056, 2177570, 3423620, 4355140, 6847240, 7394537, 8710280, 14789074, 29578148, 36972685, 59156296, 73945370, 147890740, 295781480, 525012127, 1050024254, 2100048508, 2625060635, 4200097016, 5250121270, 10500242540, 21000485080]

約数ペア:

[(1, 21000485080), (2, 10500242540), (4, 5250121270), (5, 4200097016), (8, 2625060635), (10, 2100048508), (20, 1050024254), (40, 525012127), (71, 295781480), (142, 147890740), (284, 73945370), (355, 59156296), (568, 36972685), (710, 29578148), (1420, 14789074), (2411, 8710280), (2840, 7394537), (3067, 6847240), (4822, 4355140), (6134, 3423620), (9644, 2177570), (12055, 1742056), (12268, 1711810), (15335, 1369448), (19288, 1088785), (24110, 871028), (24536, 855905), (30670, 684724), (48220, 435514), (61340, 342362), (96440, 217757), (122680, 171181)]