21351715

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1789}}^1$

素因数の和:1843

約数の個数: 32

約数和(自身を含む): 32993280

約数和(自身を除く): 11641565

約数列:

[1, 5, 7, 11, 31, 35, 55, 77, 155, 217, 341, 385, 1085, 1705, 1789, 2387, 8945, 11935, 12523, 19679, 55459, 62615, 98395, 137753, 277295, 388213, 610049, 688765, 1941065, 3050245, 4270343, 21351715]

約数ペア:

[(1, 21351715), (5, 4270343), (7, 3050245), (11, 1941065), (31, 688765), (35, 610049), (55, 388213), (77, 277295), (155, 137753), (217, 98395), (341, 62615), (385, 55459), (1085, 19679), (1705, 12523), (1789, 11935), (2387, 8945)]