20792720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19993}}^1$

素因数の和:20019

約数の個数: 40

約数和(自身を含む): 52064376

約数和(自身を除く): 31271656

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19993, 39986, 79972, 99965, 159944, 199930, 259909, 319888, 399860, 519818, 799720, 1039636, 1299545, 1599440, 2079272, 2599090, 4158544, 5198180, 10396360, 20792720]

約数ペア:

[(1, 20792720), (2, 10396360), (4, 5198180), (5, 4158544), (8, 2599090), (10, 2079272), (13, 1599440), (16, 1299545), (20, 1039636), (26, 799720), (40, 519818), (52, 399860), (65, 319888), (80, 259909), (104, 199930), (130, 159944), (208, 99965), (260, 79972), (520, 39986), (1040, 19993)]