21512120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76829}}^1$

素因数の和:76847

約数の個数: 32

約数和(自身を含む): 55317600

約数和(自身を除く): 33805480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76829, 153658, 307316, 384145, 537803, 614632, 768290, 1075606, 1536580, 2151212, 2689015, 3073160, 4302424, 5378030, 10756060, 21512120]

約数ペア:

[(1, 21512120), (2, 10756060), (4, 5378030), (5, 4302424), (7, 3073160), (8, 2689015), (10, 2151212), (14, 1536580), (20, 1075606), (28, 768290), (35, 614632), (40, 537803), (56, 384145), (70, 307316), (140, 153658), (280, 76829)]