19999720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{38461}}^1$

素因数の和:38485

約数の個数: 32

約数和(自身を含む): 48462120

約数和(自身を除く): 28462400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 38461, 76922, 153844, 192305, 307688, 384610, 499993, 769220, 999986, 1538440, 1999972, 2499965, 3999944, 4999930, 9999860, 19999720]

約数ペア:

[(1, 19999720), (2, 9999860), (4, 4999930), (5, 3999944), (8, 2499965), (10, 1999972), (13, 1538440), (20, 999986), (26, 769220), (40, 499993), (52, 384610), (65, 307688), (104, 192305), (130, 153844), (260, 76922), (520, 38461)]