213780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{509}}^1$

素因数の和:528

約数の個数: 48

約数和(自身を含む): 685440

約数和(自身を除く): 471660

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, 509, 1018, 1527, 2036, 2545, 3054, 3563, 5090, 6108, 7126, 7635, 10180, 10689, 14252, 15270, 17815, 21378, 30540, 35630, 42756, 53445, 71260, 106890, 213780]

約数ペア:

[(1, 213780), (2, 106890), (3, 71260), (4, 53445), (5, 42756), (6, 35630), (7, 30540), (10, 21378), (12, 17815), (14, 15270), (15, 14252), (20, 10689), (21, 10180), (28, 7635), (30, 7126), (35, 6108), (42, 5090), (60, 3563), (70, 3054), (84, 2545), (105, 2036), (140, 1527), (210, 1018), (420, 509)]