21285110

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{359}}^1$

素因数の和:402

約数の個数: 72

約数和(自身を含む): 49124880

約数和(自身を除く): 27839770

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 49, 55, 70, 77, 98, 110, 121, 154, 242, 245, 359, 385, 490, 539, 605, 718, 770, 847, 1078, 1210, 1694, 1795, 2513, 2695, 3590, 3949, 4235, 5026, 5390, 5929, 7898, 8470, 11858, 12565, 17591, 19745, 25130, 27643, 29645, 35182, 39490, 43439, 55286, 59290, 86878, 87955, 138215, 175910, 193501, 217195, 276430, 304073, 387002, 434390, 608146, 967505, 1520365, 1935010, 2128511, 3040730, 4257022, 10642555, 21285110]

約数ペア:

[(1, 21285110), (2, 10642555), (5, 4257022), (7, 3040730), (10, 2128511), (11, 1935010), (14, 1520365), (22, 967505), (35, 608146), (49, 434390), (55, 387002), (70, 304073), (77, 276430), (98, 217195), (110, 193501), (121, 175910), (154, 138215), (242, 87955), (245, 86878), (359, 59290), (385, 55286), (490, 43439), (539, 39490), (605, 35182), (718, 29645), (770, 27643), (847, 25130), (1078, 19745), (1210, 17591), (1694, 12565), (1795, 11858), (2513, 8470), (2695, 7898), (3590, 5929), (3949, 5390), (4235, 5026)]