20457615

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{359}}^1$

素因数の和:527

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 13756785

約数列:

[1, 3, 5, 15, 29, 87, 131, 145, 359, 393, 435, 655, 1077, 1795, 1965, 3799, 5385, 10411, 11397, 18995, 31233, 47029, 52055, 56985, 141087, 156165, 235145, 705435, 1363841, 4091523, 6819205, 20457615]

約数ペア:

[(1, 20457615), (3, 6819205), (5, 4091523), (15, 1363841), (29, 705435), (87, 235145), (131, 156165), (145, 141087), (359, 56985), (393, 52055), (435, 47029), (655, 31233), (1077, 18995), (1795, 11397), (1965, 10411), (3799, 5385)]