21225015

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1567}}^1$

素因数の和:1628

約数の個数: 48

約数和(自身を含む): 43051008

約数和(自身を除く): 21825993

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 63, 105, 129, 215, 301, 315, 387, 645, 903, 1505, 1567, 1935, 2709, 4515, 4701, 7835, 10969, 13545, 14103, 23505, 32907, 54845, 67381, 70515, 98721, 164535, 202143, 336905, 471667, 493605, 606429, 1010715, 1415001, 2358335, 3032145, 4245003, 7075005, 21225015]

約数ペア:

[(1, 21225015), (3, 7075005), (5, 4245003), (7, 3032145), (9, 2358335), (15, 1415001), (21, 1010715), (35, 606429), (43, 493605), (45, 471667), (63, 336905), (105, 202143), (129, 164535), (215, 98721), (301, 70515), (315, 67381), (387, 54845), (645, 32907), (903, 23505), (1505, 14103), (1567, 13545), (1935, 10969), (2709, 7835), (4515, 4701)]