81887920

素因数分解:

$2^4\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2011}}^1$

素因数の和:2533

約数の個数: 40

約数和(自身を含む): 190858320

約数和(自身を除く): 108970400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 509, 1018, 2011, 2036, 2545, 4022, 4072, 5090, 8044, 8144, 10055, 10180, 16088, 20110, 20360, 32176, 40220, 40720, 80440, 160880, 1023599, 2047198, 4094396, 5117995, 8188792, 10235990, 16377584, 20471980, 40943960, 81887920]

約数ペア:

[(1, 81887920), (2, 40943960), (4, 20471980), (5, 16377584), (8, 10235990), (10, 8188792), (16, 5117995), (20, 4094396), (40, 2047198), (80, 1023599), (509, 160880), (1018, 80440), (2011, 40720), (2036, 40220), (2545, 32176), (4022, 20360), (4072, 20110), (5090, 16088), (8044, 10180), (8144, 10055)]