20402915

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{4421}}^1$

素因数の和:4510

約数の個数: 16

約数和(自身を含む): 26744256

約数和(自身を除く): 6341341

約数列:

[1, 5, 13, 65, 71, 355, 923, 4421, 4615, 22105, 57473, 287365, 313891, 1569455, 4080583, 20402915]

約数ペア:

[(1, 20402915), (5, 4080583), (13, 1569455), (65, 313891), (71, 287365), (355, 57473), (923, 22105), (4421, 4615)]