21084580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{401}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 48625920

約数和(自身を除く): 27541340

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 239, 401, 478, 802, 956, 1195, 1604, 2005, 2390, 2629, 4010, 4411, 4780, 5258, 8020, 8822, 10516, 13145, 17644, 22055, 26290, 44110, 52580, 88220, 95839, 191678, 383356, 479195, 958390, 1054229, 1916780, 2108458, 4216916, 5271145, 10542290, 21084580]

約数ペア:

[(1, 21084580), (2, 10542290), (4, 5271145), (5, 4216916), (10, 2108458), (11, 1916780), (20, 1054229), (22, 958390), (44, 479195), (55, 383356), (110, 191678), (220, 95839), (239, 88220), (401, 52580), (478, 44110), (802, 26290), (956, 22055), (1195, 17644), (1604, 13145), (2005, 10516), (2390, 8822), (2629, 8020), (4010, 5258), (4411, 4780)]