21347320

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1061}}^1$

素因数の和:1575

約数の個数: 32

約数和(自身を含む): 48172320

約数和(自身を除く): 26825000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 1006, 1061, 2012, 2122, 2515, 4024, 4244, 5030, 5305, 8488, 10060, 10610, 20120, 21220, 42440, 533683, 1067366, 2134732, 2668415, 4269464, 5336830, 10673660, 21347320]

約数ペア:

[(1, 21347320), (2, 10673660), (4, 5336830), (5, 4269464), (8, 2668415), (10, 2134732), (20, 1067366), (40, 533683), (503, 42440), (1006, 21220), (1061, 20120), (2012, 10610), (2122, 10060), (2515, 8488), (4024, 5305), (4244, 5030)]