20108560

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1601}}^1$

素因数の和:1771

約数の個数: 40

約数和(自身を含む): 47079576

約数和(自身を除く): 26971016

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 1601, 2512, 3140, 3202, 6280, 6404, 8005, 12560, 12808, 16010, 25616, 32020, 64040, 128080, 251357, 502714, 1005428, 1256785, 2010856, 2513570, 4021712, 5027140, 10054280, 20108560]

約数ペア:

[(1, 20108560), (2, 10054280), (4, 5027140), (5, 4021712), (8, 2513570), (10, 2010856), (16, 1256785), (20, 1005428), (40, 502714), (80, 251357), (157, 128080), (314, 64040), (628, 32020), (785, 25616), (1256, 16010), (1570, 12808), (1601, 12560), (2512, 8005), (3140, 6404), (3202, 6280)]