20346820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{563}}^1$

素因数の和:724

約数の個数: 48

約数和(自身を含む): 46428480

約数和(自身を除く): 26081660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 139, 260, 278, 556, 563, 695, 1126, 1390, 1807, 2252, 2780, 2815, 3614, 5630, 7228, 7319, 9035, 11260, 14638, 18070, 29276, 36140, 36595, 73190, 78257, 146380, 156514, 313028, 391285, 782570, 1017341, 1565140, 2034682, 4069364, 5086705, 10173410, 20346820]

約数ペア:

[(1, 20346820), (2, 10173410), (4, 5086705), (5, 4069364), (10, 2034682), (13, 1565140), (20, 1017341), (26, 782570), (52, 391285), (65, 313028), (130, 156514), (139, 146380), (260, 78257), (278, 73190), (556, 36595), (563, 36140), (695, 29276), (1126, 18070), (1390, 14638), (1807, 11260), (2252, 9035), (2780, 7319), (2815, 7228), (3614, 5630)]