21206720

素因数分解:

$2^6\times 5^1\times {\mathrm{66271}}^1$

素因数の和:66288

約数の個数: 28

約数和(自身を含む): 50499264

約数和(自身を除く): 29292544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66271, 132542, 265084, 331355, 530168, 662710, 1060336, 1325420, 2120672, 2650840, 4241344, 5301680, 10603360, 21206720]

約数ペア:

[(1, 21206720), (2, 10603360), (4, 5301680), (5, 4241344), (8, 2650840), (10, 2120672), (16, 1325420), (20, 1060336), (32, 662710), (40, 530168), (64, 331355), (80, 265084), (160, 132542), (320, 66271)]