81720860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{1223}}^1$

素因数の和:1502

約数の個数: 48

約数和(自身を含む): 185685696

約数和(自身を除く): 103964836

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 257, 260, 514, 1028, 1223, 1285, 2446, 2570, 3341, 4892, 5140, 6115, 6682, 12230, 13364, 15899, 16705, 24460, 31798, 33410, 63596, 66820, 79495, 158990, 314311, 317980, 628622, 1257244, 1571555, 3143110, 4086043, 6286220, 8172086, 16344172, 20430215, 40860430, 81720860]

約数ペア:

[(1, 81720860), (2, 40860430), (4, 20430215), (5, 16344172), (10, 8172086), (13, 6286220), (20, 4086043), (26, 3143110), (52, 1571555), (65, 1257244), (130, 628622), (257, 317980), (260, 314311), (514, 158990), (1028, 79495), (1223, 66820), (1285, 63596), (2446, 33410), (2570, 31798), (3341, 24460), (4892, 16705), (5140, 15899), (6115, 13364), (6682, 12230)]