13280920

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{5443}}^1$

素因数の和:5515

約数の個数: 32

約数和(自身を含む): 30377520

約数和(自身を除く): 17096600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 5443, 10886, 21772, 27215, 43544, 54430, 108860, 217720, 332023, 664046, 1328092, 1660115, 2656184, 3320230, 6640460, 13280920]

約数ペア:

[(1, 13280920), (2, 6640460), (4, 3320230), (5, 2656184), (8, 1660115), (10, 1328092), (20, 664046), (40, 332023), (61, 217720), (122, 108860), (244, 54430), (305, 43544), (488, 27215), (610, 21772), (1220, 10886), (2440, 5443)]