20157495

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{577}}^1$

素因数の和:739

約数の個数: 32

約数和(自身を含む): 34458048

約数和(自身を除く): 14300553

約数列:

[1, 3, 5, 15, 17, 51, 85, 137, 255, 411, 577, 685, 1731, 2055, 2329, 2885, 6987, 8655, 9809, 11645, 29427, 34935, 49045, 79049, 147135, 237147, 395245, 1185735, 1343833, 4031499, 6719165, 20157495]

約数ペア:

[(1, 20157495), (3, 6719165), (5, 4031499), (15, 1343833), (17, 1185735), (51, 395245), (85, 237147), (137, 147135), (255, 79049), (411, 49045), (577, 34935), (685, 29427), (1731, 11645), (2055, 9809), (2329, 8655), (2885, 6987)]