21229220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17401}}^1$

素因数の和:17471

約数の個数: 24

約数和(自身を含む): 45314808

約数和(自身を除く): 24085588

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17401, 34802, 69604, 87005, 174010, 348020, 1061461, 2122922, 4245844, 5307305, 10614610, 21229220]

約数ペア:

[(1, 21229220), (2, 10614610), (4, 5307305), (5, 4245844), (10, 2122922), (20, 1061461), (61, 348020), (122, 174010), (244, 87005), (305, 69604), (610, 34802), (1220, 17401)]