20851215

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{2579}}^1$

素因数の和:2612

約数の個数: 48

約数和(自身を含む): 42353280

約数和(自身を除く): 21502065

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 49, 55, 77, 105, 147, 165, 231, 245, 385, 539, 735, 1155, 1617, 2579, 2695, 7737, 8085, 12895, 18053, 28369, 38685, 54159, 85107, 90265, 126371, 141845, 198583, 270795, 379113, 425535, 595749, 631855, 992915, 1390081, 1895565, 2978745, 4170243, 6950405, 20851215]

約数ペア:

[(1, 20851215), (3, 6950405), (5, 4170243), (7, 2978745), (11, 1895565), (15, 1390081), (21, 992915), (33, 631855), (35, 595749), (49, 425535), (55, 379113), (77, 270795), (105, 198583), (147, 141845), (165, 126371), (231, 90265), (245, 85107), (385, 54159), (539, 38685), (735, 28369), (1155, 18053), (1617, 12895), (2579, 8085), (2695, 7737)]