21025840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23893}}^1$

素因数の和:23917

約数の個数: 40

約数和(自身を含む): 53331408

約数和(自身を除く): 32305568

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23893, 47786, 95572, 119465, 191144, 238930, 262823, 382288, 477860, 525646, 955720, 1051292, 1314115, 1911440, 2102584, 2628230, 4205168, 5256460, 10512920, 21025840]

約数ペア:

[(1, 21025840), (2, 10512920), (4, 5256460), (5, 4205168), (8, 2628230), (10, 2102584), (11, 1911440), (16, 1314115), (20, 1051292), (22, 955720), (40, 525646), (44, 477860), (55, 382288), (80, 262823), (88, 238930), (110, 191144), (176, 119465), (220, 95572), (440, 47786), (880, 23893)]