28390060

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19993}}^1$

素因数の和:20073

約数の個数: 24

約数和(自身を含む): 60461856

約数和(自身を除く): 32071796

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 19993, 39986, 79972, 99965, 199930, 399860, 1419503, 2839006, 5678012, 7097515, 14195030, 28390060]

約数ペア:

[(1, 28390060), (2, 14195030), (4, 7097515), (5, 5678012), (10, 2839006), (20, 1419503), (71, 399860), (142, 199930), (284, 99965), (355, 79972), (710, 39986), (1420, 19993)]