18700040

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4289}}^1$

素因数の和:4409

約数の個数: 32

約数和(自身を含む): 42471000

約数和(自身を除く): 23770960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4289, 4360, 8578, 17156, 21445, 34312, 42890, 85780, 171560, 467501, 935002, 1870004, 2337505, 3740008, 4675010, 9350020, 18700040]

約数ペア:

[(1, 18700040), (2, 9350020), (4, 4675010), (5, 3740008), (8, 2337505), (10, 1870004), (20, 935002), (40, 467501), (109, 171560), (218, 85780), (436, 42890), (545, 34312), (872, 21445), (1090, 17156), (2180, 8578), (4289, 4360)]