27720020

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{5393}}^1$

素因数の和:5659

約数の個数: 24

約数和(自身を含む): 58449384

約数和(自身を除く): 30729364

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 5140, 5393, 10786, 21572, 26965, 53930, 107860, 1386001, 2772002, 5544004, 6930005, 13860010, 27720020]

約数ペア:

[(1, 27720020), (2, 13860010), (4, 6930005), (5, 5544004), (10, 2772002), (20, 1386001), (257, 107860), (514, 53930), (1028, 26965), (1285, 21572), (2570, 10786), (5140, 5393)]