31389860

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{19867}}^1$

素因数の和:19955

約数の個数: 24

約数和(自身を含む): 66756480

約数和(自身を除く): 35366620

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 19867, 39734, 79468, 99335, 198670, 397340, 1569493, 3138986, 6277972, 7847465, 15694930, 31389860]

約数ペア:

[(1, 31389860), (2, 15694930), (4, 7847465), (5, 6277972), (10, 3138986), (20, 1569493), (79, 397340), (158, 198670), (316, 99335), (395, 79468), (790, 39734), (1580, 19867)]