21391370

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2137}}^1$

素因数の和:2175

約数の個数: 64

約数和(自身を含む): 51722496

約数和(自身を除く): 30331126

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 26, 35, 55, 65, 70, 77, 91, 110, 130, 143, 154, 182, 286, 385, 455, 715, 770, 910, 1001, 1430, 2002, 2137, 4274, 5005, 10010, 10685, 14959, 21370, 23507, 27781, 29918, 47014, 55562, 74795, 117535, 138905, 149590, 164549, 194467, 235070, 277810, 305591, 329098, 388934, 611182, 822745, 972335, 1527955, 1645490, 1944670, 2139137, 3055910, 4278274, 10695685, 21391370]

約数ペア:

[(1, 21391370), (2, 10695685), (5, 4278274), (7, 3055910), (10, 2139137), (11, 1944670), (13, 1645490), (14, 1527955), (22, 972335), (26, 822745), (35, 611182), (55, 388934), (65, 329098), (70, 305591), (77, 277810), (91, 235070), (110, 194467), (130, 164549), (143, 149590), (154, 138905), (182, 117535), (286, 74795), (385, 55562), (455, 47014), (715, 29918), (770, 27781), (910, 23507), (1001, 21370), (1430, 14959), (2002, 10685), (2137, 10010), (4274, 5005)]