18888440

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{2897}}^1$

素因数の和:3071

約数の個数: 32

約数和(自身を含む): 42774480

約数和(自身を除く): 23886040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 2897, 3260, 5794, 6520, 11588, 14485, 23176, 28970, 57940, 115880, 472211, 944422, 1888844, 2361055, 3777688, 4722110, 9444220, 18888440]

約数ペア:

[(1, 18888440), (2, 9444220), (4, 4722110), (5, 3777688), (8, 2361055), (10, 1888844), (20, 944422), (40, 472211), (163, 115880), (326, 57940), (652, 28970), (815, 23176), (1304, 14485), (1630, 11588), (2897, 6520), (3260, 5794)]