21494680

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{10139}}^1$

素因数の和:10203

約数の個数: 32

約数和(自身を含む): 49280400

約数和(自身を除く): 27785720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 10139, 20278, 40556, 50695, 81112, 101390, 202780, 405560, 537367, 1074734, 2149468, 2686835, 4298936, 5373670, 10747340, 21494680]

約数ペア:

[(1, 21494680), (2, 10747340), (4, 5373670), (5, 4298936), (8, 2686835), (10, 2149468), (20, 1074734), (40, 537367), (53, 405560), (106, 202780), (212, 101390), (265, 81112), (424, 50695), (530, 40556), (1060, 20278), (2120, 10139)]