21998305

素因数分解:

$5^1\times 7^3\times {\mathrm{101}}^1\times {\mathrm{127}}^1$

素因数の和:254

約数の個数: 32

約数和(自身を含む): 31334400

約数和(自身を除く): 9336095

約数列:

[1, 5, 7, 35, 49, 101, 127, 245, 343, 505, 635, 707, 889, 1715, 3535, 4445, 4949, 6223, 12827, 24745, 31115, 34643, 43561, 64135, 89789, 173215, 217805, 448945, 628523, 3142615, 4399661, 21998305]

約数ペア:

[(1, 21998305), (5, 4399661), (7, 3142615), (35, 628523), (49, 448945), (101, 217805), (127, 173215), (245, 89789), (343, 64135), (505, 43561), (635, 34643), (707, 31115), (889, 24745), (1715, 12827), (3535, 6223), (4445, 4949)]