128589220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{105401}}^1$

素因数の和:105471

約数の個数: 24

約数和(自身を含む): 274466808

約数和(自身を除く): 145877588

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 105401, 210802, 421604, 527005, 1054010, 2108020, 6429461, 12858922, 25717844, 32147305, 64294610, 128589220]

約数ペア:

[(1, 128589220), (2, 64294610), (4, 32147305), (5, 25717844), (10, 12858922), (20, 6429461), (61, 2108020), (122, 1054010), (244, 527005), (305, 421604), (610, 210802), (1220, 105401)]