21997725

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{359}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 39283200

約数和(自身を除く): 17285475

約数列:

[1, 3, 5, 15, 19, 25, 43, 57, 75, 95, 129, 215, 285, 359, 475, 645, 817, 1075, 1077, 1425, 1795, 2451, 3225, 4085, 5385, 6821, 8975, 12255, 15437, 20425, 20463, 26925, 34105, 46311, 61275, 77185, 102315, 170525, 231555, 293303, 385925, 511575, 879909, 1157775, 1466515, 4399545, 7332575, 21997725]

約数ペア:

[(1, 21997725), (3, 7332575), (5, 4399545), (15, 1466515), (19, 1157775), (25, 879909), (43, 511575), (57, 385925), (75, 293303), (95, 231555), (129, 170525), (215, 102315), (285, 77185), (359, 61275), (475, 46311), (645, 34105), (817, 26925), (1075, 20463), (1077, 20425), (1425, 15437), (1795, 12255), (2451, 8975), (3225, 6821), (4085, 5385)]