51356920

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{2003}}^1$

素因数の和:2655

約数の個数: 32

約数和(自身を含む): 115791120

約数和(自身を除く): 64434200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 2003, 2564, 3205, 4006, 5128, 6410, 8012, 10015, 12820, 16024, 20030, 25640, 40060, 80120, 1283923, 2567846, 5135692, 6419615, 10271384, 12839230, 25678460, 51356920]

約数ペア:

[(1, 51356920), (2, 25678460), (4, 12839230), (5, 10271384), (8, 6419615), (10, 5135692), (20, 2567846), (40, 1283923), (641, 80120), (1282, 40060), (2003, 25640), (2564, 20030), (3205, 16024), (4006, 12820), (5128, 10015), (6410, 8012)]