81321515

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{163}}^1\times {\mathrm{193}}^1$

素因数の和:419

約数の個数: 32

約数和(自身を含む): 109956096

約数和(自身を除く): 28634581

約数列:

[1, 5, 11, 47, 55, 163, 193, 235, 517, 815, 965, 1793, 2123, 2585, 7661, 8965, 9071, 10615, 31459, 38305, 45355, 84271, 99781, 157295, 346049, 421355, 498905, 1478573, 1730245, 7392865, 16264303, 81321515]

約数ペア:

[(1, 81321515), (5, 16264303), (11, 7392865), (47, 1730245), (55, 1478573), (163, 498905), (193, 421355), (235, 346049), (517, 157295), (815, 99781), (965, 84271), (1793, 45355), (2123, 38305), (2585, 31459), (7661, 10615), (8965, 9071)]