256566505

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{211}}^1\times {\mathrm{1439}}^1$

素因数の和:1681

約数の個数: 24

約数和(自身を含む): 335197440

約数和(自身を除く): 78630935

約数列:

[1, 5, 13, 65, 169, 211, 845, 1055, 1439, 2743, 7195, 13715, 18707, 35659, 93535, 178295, 243191, 303629, 1215955, 1518145, 3947177, 19735885, 51313301, 256566505]

約数ペア:

[(1, 256566505), (5, 51313301), (13, 19735885), (65, 3947177), (169, 1518145), (211, 1215955), (845, 303629), (1055, 243191), (1439, 178295), (2743, 93535), (7195, 35659), (13715, 18707)]