21000455260

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{839}}^1\times {\mathrm{17627}}^1$

素因数の和:18546

約数の個数: 48

約数和(自身を含む): 44777940480

約数和(自身を除く): 23777485220

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 839, 1420, 1678, 3356, 4195, 8390, 16780, 17627, 35254, 59569, 70508, 88135, 119138, 176270, 238276, 297845, 352540, 595690, 1191380, 1251517, 2503034, 5006068, 6257585, 12515170, 14789053, 25030340, 29578106, 59156212, 73945265, 147890530, 295781060, 1050022763, 2100045526, 4200091052, 5250113815, 10500227630, 21000455260]

約数ペア:

[(1, 21000455260), (2, 10500227630), (4, 5250113815), (5, 4200091052), (10, 2100045526), (20, 1050022763), (71, 295781060), (142, 147890530), (284, 73945265), (355, 59156212), (710, 29578106), (839, 25030340), (1420, 14789053), (1678, 12515170), (3356, 6257585), (4195, 5006068), (8390, 2503034), (16780, 1251517), (17627, 1191380), (35254, 595690), (59569, 352540), (70508, 297845), (88135, 238276), (119138, 176270)]