20065000

素因数分解:

$2^3\times 5^4\times {\mathrm{4013}}^1$

素因数の和:4039

約数の個数: 40

約数和(自身を含む): 47024010

約数和(自身を除く): 26959010

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 4013, 5000, 8026, 16052, 20065, 32104, 40130, 80260, 100325, 160520, 200650, 401300, 501625, 802600, 1003250, 2006500, 2508125, 4013000, 5016250, 10032500, 20065000]

約数ペア:

[(1, 20065000), (2, 10032500), (4, 5016250), (5, 4013000), (8, 2508125), (10, 2006500), (20, 1003250), (25, 802600), (40, 501625), (50, 401300), (100, 200650), (125, 160520), (200, 100325), (250, 80260), (500, 40130), (625, 32104), (1000, 20065), (1250, 16052), (2500, 8026), (4013, 5000)]