21217210

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{6449}}^1$

素因数の和:6510

約数の個数: 32

約数和(自身を含む): 44582400

約数和(自身を除く): 23365190

約数列:

[1, 2, 5, 7, 10, 14, 35, 47, 70, 94, 235, 329, 470, 658, 1645, 3290, 6449, 12898, 32245, 45143, 64490, 90286, 225715, 303103, 451430, 606206, 1515515, 2121721, 3031030, 4243442, 10608605, 21217210]

約数ペア:

[(1, 21217210), (2, 10608605), (5, 4243442), (7, 3031030), (10, 2121721), (14, 1515515), (35, 606206), (47, 451430), (70, 303103), (94, 225715), (235, 90286), (329, 64490), (470, 45143), (658, 32245), (1645, 12898), (3290, 6449)]