21397831

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{5003}}^1$

素因数の和:5070

約数の個数: 16

約数和(自身を含む): 26901504

約数和(自身を除く): 5503673

約数列:

[1, 7, 13, 47, 91, 329, 611, 4277, 5003, 35021, 65039, 235141, 455273, 1645987, 3056833, 21397831]

約数ペア:

[(1, 21397831), (7, 3056833), (13, 1645987), (47, 455273), (91, 235141), (329, 65039), (611, 35021), (4277, 5003)]