21079751

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{151}}^1$

素因数の和:220

約数の個数: 32

約数和(自身を含む): 27724800

約数和(自身を除く): 6645049

約数列:

[1, 7, 11, 37, 49, 77, 151, 259, 343, 407, 539, 1057, 1661, 1813, 2849, 3773, 5587, 7399, 11627, 12691, 19943, 39109, 51793, 61457, 81389, 139601, 273763, 430199, 569723, 1916341, 3011393, 21079751]

約数ペア:

[(1, 21079751), (7, 3011393), (11, 1916341), (37, 569723), (49, 430199), (77, 273763), (151, 139601), (259, 81389), (343, 61457), (407, 51793), (539, 39109), (1057, 19943), (1661, 12691), (1813, 11627), (2849, 7399), (3773, 5587)]