21531811

素因数分解:

$7^1\times {\mathrm{113}}^1\times {\mathrm{163}}^1\times {\mathrm{167}}^1$

素因数の和:450

約数の個数: 16

約数和(自身を含む): 25127424

約数和(自身を除く): 3595613

約数列:

[1, 7, 113, 163, 167, 791, 1141, 1169, 18419, 18871, 27221, 128933, 132097, 190547, 3075973, 21531811]

約数ペア:

[(1, 21531811), (7, 3075973), (113, 190547), (163, 132097), (167, 128933), (791, 27221), (1141, 18871), (1169, 18419)]