20904680

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1039}}^1$

素因数の和:1553

約数の個数: 32

約数和(自身を含む): 47174400

約数和(自身を除く): 26269720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 1006, 1039, 2012, 2078, 2515, 4024, 4156, 5030, 5195, 8312, 10060, 10390, 20120, 20780, 41560, 522617, 1045234, 2090468, 2613085, 4180936, 5226170, 10452340, 20904680]

約数ペア:

[(1, 20904680), (2, 10452340), (4, 5226170), (5, 4180936), (8, 2613085), (10, 2090468), (20, 1045234), (40, 522617), (503, 41560), (1006, 20780), (1039, 20120), (2012, 10390), (2078, 10060), (2515, 8312), (4024, 5195), (4156, 5030)]