21232055

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{257}}^1$

素因数の和:347

約数の個数: 32

約数和(自身を含む): 29127168

約数和(自身を除く): 7895113

約数列:

[1, 5, 13, 31, 41, 65, 155, 205, 257, 403, 533, 1271, 1285, 2015, 2665, 3341, 6355, 7967, 10537, 16523, 16705, 39835, 52685, 82615, 103571, 136981, 326647, 517855, 684905, 1633235, 4246411, 21232055]

約数ペア:

[(1, 21232055), (5, 4246411), (13, 1633235), (31, 684905), (41, 517855), (65, 326647), (155, 136981), (205, 103571), (257, 82615), (403, 52685), (533, 39835), (1271, 16705), (1285, 16523), (2015, 10537), (2665, 7967), (3341, 6355)]