291239560

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{72089}}^1$

素因数の和:72201

約数の個数: 32

約数和(自身を含む): 661786200

約数和(自身を除く): 370546640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 72089, 144178, 288356, 360445, 576712, 720890, 1441780, 2883560, 7280989, 14561978, 29123956, 36404945, 58247912, 72809890, 145619780, 291239560]

約数ペア:

[(1, 291239560), (2, 145619780), (4, 72809890), (5, 58247912), (8, 36404945), (10, 29123956), (20, 14561978), (40, 7280989), (101, 2883560), (202, 1441780), (404, 720890), (505, 576712), (808, 360445), (1010, 288356), (2020, 144178), (4040, 72089)]