21641008

素因数分解:

$2^4\times {\mathrm{409}}^1\times {\mathrm{3307}}^1$

素因数の和:3724

約数の個数: 20

約数和(自身を含む): 42044680

約数和(自身を除く): 20403672

約数列:

[1, 2, 4, 8, 16, 409, 818, 1636, 3272, 3307, 6544, 6614, 13228, 26456, 52912, 1352563, 2705126, 5410252, 10820504, 21641008]

約数ペア:

[(1, 21641008), (2, 10820504), (4, 5410252), (8, 2705126), (16, 1352563), (409, 52912), (818, 26456), (1636, 13228), (3272, 6614), (3307, 6544)]