20542520

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1021}}^1$

素因数の和:1535

約数の個数: 32

約数和(自身を含む): 46357920

約数和(自身を除く): 25815400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 1006, 1021, 2012, 2042, 2515, 4024, 4084, 5030, 5105, 8168, 10060, 10210, 20120, 20420, 40840, 513563, 1027126, 2054252, 2567815, 4108504, 5135630, 10271260, 20542520]

約数ペア:

[(1, 20542520), (2, 10271260), (4, 5135630), (5, 4108504), (8, 2567815), (10, 2054252), (20, 1027126), (40, 513563), (503, 40840), (1006, 20420), (1021, 20120), (2012, 10210), (2042, 10060), (2515, 8168), (4024, 5105), (4084, 5030)]