18719930

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1\times {\mathrm{409}}^1$

素因数の和:638

約数の個数: 32

約数和(自身を含む): 35424000

約数和(自身を除く): 16704070

約数列:

[1, 2, 5, 10, 23, 46, 115, 199, 230, 398, 409, 818, 995, 1990, 2045, 4090, 4577, 9154, 9407, 18814, 22885, 45770, 47035, 81391, 94070, 162782, 406955, 813910, 1871993, 3743986, 9359965, 18719930]

約数ペア:

[(1, 18719930), (2, 9359965), (5, 3743986), (10, 1871993), (23, 813910), (46, 406955), (115, 162782), (199, 94070), (230, 81391), (398, 47035), (409, 45770), (818, 22885), (995, 18814), (1990, 9407), (2045, 9154), (4090, 4577)]