21999445

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{463}}^1$

素因数の和:541

約数の個数: 32

約数和(自身を含む): 30868992

約数和(自身を除く): 8869547

約数列:

[1, 5, 13, 17, 43, 65, 85, 215, 221, 463, 559, 731, 1105, 2315, 2795, 3655, 6019, 7871, 9503, 19909, 30095, 39355, 47515, 99545, 102323, 258817, 338453, 511615, 1294085, 1692265, 4399889, 21999445]

約数ペア:

[(1, 21999445), (5, 4399889), (13, 1692265), (17, 1294085), (43, 511615), (65, 338453), (85, 258817), (215, 102323), (221, 99545), (463, 47515), (559, 39355), (731, 30095), (1105, 19909), (2315, 9503), (2795, 7871), (3655, 6019)]