640286478

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{912089}}^1$

素因数の和:912113

約数の個数: 32

約数和(自身を含む): 1532311200

約数和(自身を除く): 892024722

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 78, 117, 234, 351, 702, 912089, 1824178, 2736267, 5472534, 8208801, 11857157, 16417602, 23714314, 24626403, 35571471, 49252806, 71142942, 106714413, 213428826, 320143239, 640286478]

約数ペア:

[(1, 640286478), (2, 320143239), (3, 213428826), (6, 106714413), (9, 71142942), (13, 49252806), (18, 35571471), (26, 24626403), (27, 23714314), (39, 16417602), (54, 11857157), (78, 8208801), (117, 5472534), (234, 2736267), (351, 1824178), (702, 912089)]