21247365

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{859}}^1$

素因数の和:981

約数の個数: 32

約数和(自身を含む): 36408960

約数和(自身を除く): 15161595

約数列:

[1, 3, 5, 15, 17, 51, 85, 97, 255, 291, 485, 859, 1455, 1649, 2577, 4295, 4947, 8245, 12885, 14603, 24735, 43809, 73015, 83323, 219045, 249969, 416615, 1249845, 1416491, 4249473, 7082455, 21247365]

約数ペア:

[(1, 21247365), (3, 7082455), (5, 4249473), (15, 1416491), (17, 1249845), (51, 416615), (85, 249969), (97, 219045), (255, 83323), (291, 73015), (485, 43809), (859, 24735), (1455, 14603), (1649, 12885), (2577, 8245), (4295, 4947)]