18458780

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{269}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 40279680

約数和(自身を除く): 21820900

約数列:

[1, 2, 4, 5, 10, 20, 47, 73, 94, 146, 188, 235, 269, 292, 365, 470, 538, 730, 940, 1076, 1345, 1460, 2690, 3431, 5380, 6862, 12643, 13724, 17155, 19637, 25286, 34310, 39274, 50572, 63215, 68620, 78548, 98185, 126430, 196370, 252860, 392740, 922939, 1845878, 3691756, 4614695, 9229390, 18458780]

約数ペア:

[(1, 18458780), (2, 9229390), (4, 4614695), (5, 3691756), (10, 1845878), (20, 922939), (47, 392740), (73, 252860), (94, 196370), (146, 126430), (188, 98185), (235, 78548), (269, 68620), (292, 63215), (365, 50572), (470, 39274), (538, 34310), (730, 25286), (940, 19637), (1076, 17155), (1345, 13724), (1460, 12643), (2690, 6862), (3431, 5380)]