289440020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{317}}^1\times {\mathrm{643}}^1$

素因数の和:1040

約数の個数: 48

約数和(自身を含む): 619291008

約数和(自身を除く): 329850988

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 317, 355, 634, 643, 710, 1268, 1286, 1420, 1585, 2572, 3170, 3215, 6340, 6430, 12860, 22507, 45014, 45653, 90028, 91306, 112535, 182612, 203831, 225070, 228265, 407662, 450140, 456530, 815324, 913060, 1019155, 2038310, 4076620, 14472001, 28944002, 57888004, 72360005, 144720010, 289440020]

約数ペア:

[(1, 289440020), (2, 144720010), (4, 72360005), (5, 57888004), (10, 28944002), (20, 14472001), (71, 4076620), (142, 2038310), (284, 1019155), (317, 913060), (355, 815324), (634, 456530), (643, 450140), (710, 407662), (1268, 228265), (1286, 225070), (1420, 203831), (1585, 182612), (2572, 112535), (3170, 91306), (3215, 90028), (6340, 45653), (6430, 45014), (12860, 22507)]