28778860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{257}}^1\times {\mathrm{509}}^1$

素因数の和:786

約数の個数: 48

約数和(自身を含む): 66316320

約数和(自身を除く): 37537460

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 257, 509, 514, 1018, 1028, 1285, 2036, 2545, 2570, 2827, 5090, 5140, 5599, 5654, 10180, 11198, 11308, 14135, 22396, 27995, 28270, 55990, 56540, 111980, 130813, 261626, 523252, 654065, 1308130, 1438943, 2616260, 2877886, 5755772, 7194715, 14389430, 28778860]

約数ペア:

[(1, 28778860), (2, 14389430), (4, 7194715), (5, 5755772), (10, 2877886), (11, 2616260), (20, 1438943), (22, 1308130), (44, 654065), (55, 523252), (110, 261626), (220, 130813), (257, 111980), (509, 56540), (514, 55990), (1018, 28270), (1028, 27995), (1285, 22396), (2036, 14135), (2545, 11308), (2570, 11198), (2827, 10180), (5090, 5654), (5140, 5599)]