642080

素因数分解:

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

素因数の和:4028

約数の個数: 24

約数和(自身を含む): 1517292

約数和(自身を除く): 875212

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 4013, 8026, 16052, 20065, 32104, 40130, 64208, 80260, 128416, 160520, 321040, 642080]

約数ペア:

[(1, 642080), (2, 321040), (4, 160520), (5, 128416), (8, 80260), (10, 64208), (16, 40130), (20, 32104), (32, 20065), (40, 16052), (80, 8026), (160, 4013)]