321040

素因数分解:

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

素因数の和:4026

約数の個数: 20

約数和(自身を含む): 746604

約数和(自身を除く): 425564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4013, 8026, 16052, 20065, 32104, 40130, 64208, 80260, 160520, 321040]

約数ペア:

[(1, 321040), (2, 160520), (4, 80260), (5, 64208), (8, 40130), (10, 32104), (16, 20065), (20, 16052), (40, 8026), (80, 4013)]