21248912

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78121}}^1$

素因数の和:78146

約数の個数: 20

約数和(自身を含む): 43592076

約数和(自身を除く): 22343164

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78121, 156242, 312484, 624968, 1249936, 1328057, 2656114, 5312228, 10624456, 21248912]

約数ペア:

[(1, 21248912), (2, 10624456), (4, 5312228), (8, 2656114), (16, 1328057), (17, 1249936), (34, 624968), (68, 312484), (136, 156242), (272, 78121)]