21261520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37967}}^1$

素因数の和:37987

約数の個数: 40

約数和(自身を含む): 56496384

約数和(自身を除く): 35234864

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37967, 75934, 151868, 189835, 265769, 303736, 379670, 531538, 607472, 759340, 1063076, 1328845, 1518680, 2126152, 2657690, 3037360, 4252304, 5315380, 10630760, 21261520]

約数ペア:

[(1, 21261520), (2, 10630760), (4, 5315380), (5, 4252304), (7, 3037360), (8, 2657690), (10, 2126152), (14, 1518680), (16, 1328845), (20, 1063076), (28, 759340), (35, 607472), (40, 531538), (56, 379670), (70, 303736), (80, 265769), (112, 189835), (140, 151868), (280, 75934), (560, 37967)]