20688165

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 17051355

約数列:

[1, 3, 5, 9, 15, 29, 45, 83, 87, 145, 191, 249, 261, 415, 435, 573, 747, 955, 1245, 1305, 1719, 2407, 2865, 3735, 5539, 7221, 8595, 12035, 15853, 16617, 21663, 27695, 36105, 47559, 49851, 79265, 83085, 108315, 142677, 237795, 249255, 459737, 713385, 1379211, 2298685, 4137633, 6896055, 20688165]

約数ペア:

[(1, 20688165), (3, 6896055), (5, 4137633), (9, 2298685), (15, 1379211), (29, 713385), (45, 459737), (83, 249255), (87, 237795), (145, 142677), (191, 108315), (249, 83085), (261, 79265), (415, 49851), (435, 47559), (573, 36105), (747, 27695), (955, 21663), (1245, 16617), (1305, 15853), (1719, 12035), (2407, 8595), (2865, 7221), (3735, 5539)]