19999770

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{727}}^1$

素因数の和:875

約数の個数: 64

約数和(自身を含む): 55351296

約数和(自身を除く): 35351526

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 131, 210, 262, 393, 655, 727, 786, 917, 1310, 1454, 1834, 1965, 2181, 2751, 3635, 3930, 4362, 4585, 5089, 5502, 7270, 9170, 10178, 10905, 13755, 15267, 21810, 25445, 27510, 30534, 50890, 76335, 95237, 152670, 190474, 285711, 476185, 571422, 666659, 952370, 1333318, 1428555, 1999977, 2857110, 3333295, 3999954, 6666590, 9999885, 19999770]

約数ペア:

[(1, 19999770), (2, 9999885), (3, 6666590), (5, 3999954), (6, 3333295), (7, 2857110), (10, 1999977), (14, 1428555), (15, 1333318), (21, 952370), (30, 666659), (35, 571422), (42, 476185), (70, 285711), (105, 190474), (131, 152670), (210, 95237), (262, 76335), (393, 50890), (655, 30534), (727, 27510), (786, 25445), (917, 21810), (1310, 15267), (1454, 13755), (1834, 10905), (1965, 10178), (2181, 9170), (2751, 7270), (3635, 5502), (3930, 5089), (4362, 4585)]