81221972

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{1049}}^1\times {\mathrm{1489}}^1$

素因数の和:2555

約数の個数: 24

約数和(自身を含む): 153321000

約数和(自身を除く): 72099028

約数列:

[1, 2, 4, 13, 26, 52, 1049, 1489, 2098, 2978, 4196, 5956, 13637, 19357, 27274, 38714, 54548, 77428, 1561961, 3123922, 6247844, 20305493, 40610986, 81221972]

約数ペア:

[(1, 81221972), (2, 40610986), (4, 20305493), (13, 6247844), (26, 3123922), (52, 1561961), (1049, 77428), (1489, 54548), (2098, 38714), (2978, 27274), (4196, 19357), (5956, 13637)]