19639165

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2539}}^1$

素因数の和:2581

約数の個数: 32

約数和(自身を含む): 30723840

約数和(自身を除く): 11084675

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 221, 455, 595, 1105, 1547, 2539, 7735, 12695, 17773, 33007, 43163, 88865, 165035, 215815, 231049, 302141, 561119, 1155245, 1510705, 2805595, 3927833, 19639165]

約数ペア:

[(1, 19639165), (5, 3927833), (7, 2805595), (13, 1510705), (17, 1155245), (35, 561119), (65, 302141), (85, 231049), (91, 215815), (119, 165035), (221, 88865), (455, 43163), (595, 33007), (1105, 17773), (1547, 12695), (2539, 7735)]