31139720

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{3491}}^1$

素因数の和:3725

約数の個数: 32

約数和(自身を含む): 70398720

約数和(自身を除く): 39259000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 3491, 4460, 6982, 8920, 13964, 17455, 27928, 34910, 69820, 139640, 778493, 1556986, 3113972, 3892465, 6227944, 7784930, 15569860, 31139720]

約数ペア:

[(1, 31139720), (2, 15569860), (4, 7784930), (5, 6227944), (8, 3892465), (10, 3113972), (20, 1556986), (40, 778493), (223, 139640), (446, 69820), (892, 34910), (1115, 27928), (1784, 17455), (2230, 13964), (3491, 8920), (4460, 6982)]