21568085

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 33685632

約数和(自身を除く): 12117547

約数列:

[1, 5, 7, 11, 35, 49, 53, 55, 77, 151, 245, 265, 371, 385, 539, 583, 755, 1057, 1661, 1855, 2597, 2695, 2915, 4081, 5285, 7399, 8003, 8305, 11627, 12985, 20405, 28567, 36995, 40015, 56021, 58135, 81389, 88033, 142835, 280105, 392147, 406945, 440165, 616231, 1960735, 3081155, 4313617, 21568085]

約数ペア:

[(1, 21568085), (5, 4313617), (7, 3081155), (11, 1960735), (35, 616231), (49, 440165), (53, 406945), (55, 392147), (77, 280105), (151, 142835), (245, 88033), (265, 81389), (371, 58135), (385, 56021), (539, 40015), (583, 36995), (755, 28567), (1057, 20405), (1661, 12985), (1855, 11627), (2597, 8305), (2695, 8003), (2915, 7399), (4081, 5285)]