21407920

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3769}}^1$

素因数の和:3853

約数の個数: 40

約数和(自身を含む): 50487840

約数和(自身を除く): 29079920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3769, 5680, 7538, 15076, 18845, 30152, 37690, 60304, 75380, 150760, 267599, 301520, 535198, 1070396, 1337995, 2140792, 2675990, 4281584, 5351980, 10703960, 21407920]

約数ペア:

[(1, 21407920), (2, 10703960), (4, 5351980), (5, 4281584), (8, 2675990), (10, 2140792), (16, 1337995), (20, 1070396), (40, 535198), (71, 301520), (80, 267599), (142, 150760), (284, 75380), (355, 60304), (568, 37690), (710, 30152), (1136, 18845), (1420, 15076), (2840, 7538), (3769, 5680)]