21465780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51109}}^1$

素因数の和:51128

約数の個数: 48

約数和(自身を含む): 68691840

約数和(自身を除く): 47226060

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51109, 102218, 153327, 204436, 255545, 306654, 357763, 511090, 613308, 715526, 766635, 1022180, 1073289, 1431052, 1533270, 1788815, 2146578, 3066540, 3577630, 4293156, 5366445, 7155260, 10732890, 21465780]

約数ペア:

[(1, 21465780), (2, 10732890), (3, 7155260), (4, 5366445), (5, 4293156), (6, 3577630), (7, 3066540), (10, 2146578), (12, 1788815), (14, 1533270), (15, 1431052), (20, 1073289), (21, 1022180), (28, 766635), (30, 715526), (35, 613308), (42, 511090), (60, 357763), (70, 306654), (84, 255545), (105, 204436), (140, 153327), (210, 102218), (420, 51109)]