21204645

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1669}}^1$

素因数の和:1706

約数の個数: 48

約数和(自身を含む): 42645120

約数和(自身を除く): 21440475

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 121, 165, 231, 363, 385, 605, 847, 1155, 1669, 1815, 2541, 4235, 5007, 8345, 11683, 12705, 18359, 25035, 35049, 55077, 58415, 91795, 128513, 175245, 201949, 275385, 385539, 605847, 642565, 1009745, 1413643, 1927695, 3029235, 4240929, 7068215, 21204645]

約数ペア:

[(1, 21204645), (3, 7068215), (5, 4240929), (7, 3029235), (11, 1927695), (15, 1413643), (21, 1009745), (33, 642565), (35, 605847), (55, 385539), (77, 275385), (105, 201949), (121, 175245), (165, 128513), (231, 91795), (363, 58415), (385, 55077), (605, 35049), (847, 25035), (1155, 18359), (1669, 12705), (1815, 11683), (2541, 8345), (4235, 5007)]