20405979

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{541}}^1$

素因数の和:688

約数の個数: 32

約数和(自身を含む): 33300480

約数和(自身を除く): 12894501

約数列:

[1, 3, 9, 11, 27, 33, 99, 127, 297, 381, 541, 1143, 1397, 1623, 3429, 4191, 4869, 5951, 12573, 14607, 17853, 37719, 53559, 68707, 160677, 206121, 618363, 755777, 1855089, 2267331, 6801993, 20405979]

約数ペア:

[(1, 20405979), (3, 6801993), (9, 2267331), (11, 1855089), (27, 755777), (33, 618363), (99, 206121), (127, 160677), (297, 68707), (381, 53559), (541, 37719), (1143, 17853), (1397, 14607), (1623, 12573), (3429, 5951), (4191, 4869)]