21457485

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{4007}}^1$

素因数の和:4042

約数の個数: 48

約数和(自身を含む): 45017856

約数和(自身を除く): 23560371

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 4007, 5355, 12021, 20035, 28049, 36063, 60105, 68119, 84147, 140245, 180315, 204357, 252441, 340595, 420735, 476833, 613071, 1021785, 1262205, 1430499, 2384165, 3065355, 4291497, 7152495, 21457485]

約数ペア:

[(1, 21457485), (3, 7152495), (5, 4291497), (7, 3065355), (9, 2384165), (15, 1430499), (17, 1262205), (21, 1021785), (35, 613071), (45, 476833), (51, 420735), (63, 340595), (85, 252441), (105, 204357), (119, 180315), (153, 140245), (255, 84147), (315, 68119), (357, 60105), (595, 36063), (765, 28049), (1071, 20035), (1785, 12021), (4007, 5355)]