21890475

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1$

素因数の和:189

約数の個数: 72

約数和(自身を含む): 42653520

約数和(自身を除く): 20763045

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 59, 75, 85, 97, 153, 177, 225, 255, 291, 295, 425, 485, 531, 765, 873, 885, 1003, 1275, 1455, 1475, 1649, 2425, 2655, 3009, 3825, 4365, 4425, 4947, 5015, 5723, 7275, 8245, 9027, 13275, 14841, 15045, 17169, 21825, 24735, 25075, 28615, 41225, 45135, 51507, 74205, 75225, 85845, 97291, 123675, 143075, 225675, 257535, 291873, 371025, 429225, 486455, 875619, 1287675, 1459365, 2432275, 4378095, 7296825, 21890475]

約数ペア:

[(1, 21890475), (3, 7296825), (5, 4378095), (9, 2432275), (15, 1459365), (17, 1287675), (25, 875619), (45, 486455), (51, 429225), (59, 371025), (75, 291873), (85, 257535), (97, 225675), (153, 143075), (177, 123675), (225, 97291), (255, 85845), (291, 75225), (295, 74205), (425, 51507), (485, 45135), (531, 41225), (765, 28615), (873, 25075), (885, 24735), (1003, 21825), (1275, 17169), (1455, 15045), (1475, 14841), (1649, 13275), (2425, 9027), (2655, 8245), (3009, 7275), (3825, 5723), (4365, 5015), (4425, 4947)]