643520

素因数分解:

$2^6\times 5^1\times {\mathrm{2011}}^1$

素因数の和:2028

約数の個数: 28

約数和(自身を含む): 1533144

約数和(自身を除く): 889624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 2011, 4022, 8044, 10055, 16088, 20110, 32176, 40220, 64352, 80440, 128704, 160880, 321760, 643520]

約数ペア:

[(1, 643520), (2, 321760), (4, 160880), (5, 128704), (8, 80440), (10, 64352), (16, 40220), (20, 32176), (32, 20110), (40, 16088), (64, 10055), (80, 8044), (160, 4022), (320, 2011)]