21216065

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{419}}^1$

素因数の和:497

約数の個数: 32

約数和(自身を含む): 29635200

約数和(自身を除く): 8419135

約数列:

[1, 5, 13, 19, 41, 65, 95, 205, 247, 419, 533, 779, 1235, 2095, 2665, 3895, 5447, 7961, 10127, 17179, 27235, 39805, 50635, 85895, 103493, 223327, 326401, 517465, 1116635, 1632005, 4243213, 21216065]

約数ペア:

[(1, 21216065), (5, 4243213), (13, 1632005), (19, 1116635), (41, 517465), (65, 326401), (95, 223327), (205, 103493), (247, 85895), (419, 50635), (533, 39805), (779, 27235), (1235, 17179), (2095, 10127), (2665, 7961), (3895, 5447)]