31999880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{72727}}^1$

素因数の和:72749

約数の個数: 32

約数和(自身を含む): 78546240

約数和(自身を除く): 46546360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 72727, 145454, 290908, 363635, 581816, 727270, 799997, 1454540, 1599994, 2909080, 3199988, 3999985, 6399976, 7999970, 15999940, 31999880]

約数ペア:

[(1, 31999880), (2, 15999940), (4, 7999970), (5, 6399976), (8, 3999985), (10, 3199988), (11, 2909080), (20, 1599994), (22, 1454540), (40, 799997), (44, 727270), (55, 581816), (88, 363635), (110, 290908), (220, 145454), (440, 72727)]