4400840

素因数分解:

$2^3\times 5^1\times {\mathrm{269}}^1\times {\mathrm{409}}^1$

素因数の和:689

約数の個数: 32

約数和(自身を含む): 9963000

約数和(自身を除く): 5562160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 269, 409, 538, 818, 1076, 1345, 1636, 2045, 2152, 2690, 3272, 4090, 5380, 8180, 10760, 16360, 110021, 220042, 440084, 550105, 880168, 1100210, 2200420, 4400840]

約数ペア:

[(1, 4400840), (2, 2200420), (4, 1100210), (5, 880168), (8, 550105), (10, 440084), (20, 220042), (40, 110021), (269, 16360), (409, 10760), (538, 8180), (818, 5380), (1076, 4090), (1345, 3272), (1636, 2690), (2045, 2152)]