21128260

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{1997}}^1$

素因数の和:2052

約数の個数: 36

約数和(自身を含む): 46405548

約数和(自身を除く): 25277288

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 529, 1058, 1997, 2116, 2645, 3994, 5290, 7988, 9985, 10580, 19970, 39940, 45931, 91862, 183724, 229655, 459310, 918620, 1056413, 2112826, 4225652, 5282065, 10564130, 21128260]

約数ペア:

[(1, 21128260), (2, 10564130), (4, 5282065), (5, 4225652), (10, 2112826), (20, 1056413), (23, 918620), (46, 459310), (92, 229655), (115, 183724), (230, 91862), (460, 45931), (529, 39940), (1058, 19970), (1997, 10580), (2116, 9985), (2645, 7988), (3994, 5290)]