20705920

素因数分解:

$2^7\times 5^1\times {\mathrm{32353}}^1$

素因数の和:32372

約数の個数: 32

約数和(自身を含む): 49501620

約数和(自身を除く): 28795700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32353, 64706, 129412, 161765, 258824, 323530, 517648, 647060, 1035296, 1294120, 2070592, 2588240, 4141184, 5176480, 10352960, 20705920]

約数ペア:

[(1, 20705920), (2, 10352960), (4, 5176480), (5, 4141184), (8, 2588240), (10, 2070592), (16, 1294120), (20, 1035296), (32, 647060), (40, 517648), (64, 323530), (80, 258824), (128, 161765), (160, 129412), (320, 64706), (640, 32353)]