643500520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1237501}}^1$

素因数の和:1237525

約数の個数: 32

約数和(自身を含む): 1559252520

約数和(自身を除く): 915752000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1237501, 2475002, 4950004, 6187505, 9900008, 12375010, 16087513, 24750020, 32175026, 49500040, 64350052, 80437565, 128700104, 160875130, 321750260, 643500520]

約数ペア:

[(1, 643500520), (2, 321750260), (4, 160875130), (5, 128700104), (8, 80437565), (10, 64350052), (13, 49500040), (20, 32175026), (26, 24750020), (40, 16087513), (52, 12375010), (65, 9900008), (104, 6187505), (130, 4950004), (260, 2475002), (520, 1237501)]