21109791

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:267

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 9855969

約数列:

[1, 3, 23, 31, 69, 71, 93, 139, 213, 417, 713, 1633, 2139, 2201, 3197, 4309, 4899, 6603, 9591, 9869, 12927, 29607, 50623, 99107, 151869, 226987, 297321, 305939, 680961, 917817, 7036597, 21109791]

約数ペア:

[(1, 21109791), (3, 7036597), (23, 917817), (31, 680961), (69, 305939), (71, 297321), (93, 226987), (139, 151869), (213, 99107), (417, 50623), (713, 29607), (1633, 12927), (2139, 9869), (2201, 9591), (3197, 6603), (4309, 4899)]