19810705

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{5557}}^1$

素因数の和:5616

約数の個数: 16

約数和(自身を含む): 25611264

約数和(自身を除く): 5800559

約数列:

[1, 5, 23, 31, 115, 155, 713, 3565, 5557, 27785, 127811, 172267, 639055, 861335, 3962141, 19810705]

約数ペア:

[(1, 19810705), (5, 3962141), (23, 861335), (31, 639055), (115, 172267), (155, 127811), (713, 27785), (3565, 5557)]