20418860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13259}}^1$

素因数の和:13286

約数の個数: 48

約数和(自身を含む): 53464320

約数和(自身を除く): 33045460

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13259, 26518, 53036, 66295, 92813, 132590, 145849, 185626, 265180, 291698, 371252, 464065, 583396, 729245, 928130, 1020943, 1458490, 1856260, 2041886, 2916980, 4083772, 5104715, 10209430, 20418860]

約数ペア:

[(1, 20418860), (2, 10209430), (4, 5104715), (5, 4083772), (7, 2916980), (10, 2041886), (11, 1856260), (14, 1458490), (20, 1020943), (22, 928130), (28, 729245), (35, 583396), (44, 464065), (55, 371252), (70, 291698), (77, 265180), (110, 185626), (140, 145849), (154, 132590), (220, 92813), (308, 66295), (385, 53036), (770, 26518), (1540, 13259)]