20743720

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1031}}^1$

素因数の和:1545

約数の個数: 32

約数和(自身を含む): 46811520

約数和(自身を除く): 26067800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 1006, 1031, 2012, 2062, 2515, 4024, 4124, 5030, 5155, 8248, 10060, 10310, 20120, 20620, 41240, 518593, 1037186, 2074372, 2592965, 4148744, 5185930, 10371860, 20743720]

約数ペア:

[(1, 20743720), (2, 10371860), (4, 5185930), (5, 4148744), (8, 2592965), (10, 2074372), (20, 1037186), (40, 518593), (503, 41240), (1006, 20620), (1031, 20120), (2012, 10310), (2062, 10060), (2515, 8248), (4024, 5155), (4124, 5030)]