20950288

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{823}}^1$

素因数の和:911

約数の個数: 40

約数和(自身を含む): 42709568

約数和(自身を除く): 21759280

約数列:

[1, 2, 4, 8, 16, 37, 43, 74, 86, 148, 172, 296, 344, 592, 688, 823, 1591, 1646, 3182, 3292, 6364, 6584, 12728, 13168, 25456, 30451, 35389, 60902, 70778, 121804, 141556, 243608, 283112, 487216, 566224, 1309393, 2618786, 5237572, 10475144, 20950288]

約数ペア:

[(1, 20950288), (2, 10475144), (4, 5237572), (8, 2618786), (16, 1309393), (37, 566224), (43, 487216), (74, 283112), (86, 243608), (148, 141556), (172, 121804), (296, 70778), (344, 60902), (592, 35389), (688, 30451), (823, 25456), (1591, 13168), (1646, 12728), (3182, 6584), (3292, 6364)]