28007000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{4001}}^1$

素因数の和:4029

約数の個数: 64

約数和(自身を含む): 74917440

約数和(自身を除く): 46910440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 125, 140, 175, 200, 250, 280, 350, 500, 700, 875, 1000, 1400, 1750, 3500, 4001, 7000, 8002, 16004, 20005, 28007, 32008, 40010, 56014, 80020, 100025, 112028, 140035, 160040, 200050, 224056, 280070, 400100, 500125, 560140, 700175, 800200, 1000250, 1120280, 1400350, 2000500, 2800700, 3500875, 4001000, 5601400, 7001750, 14003500, 28007000]

約数ペア:

[(1, 28007000), (2, 14003500), (4, 7001750), (5, 5601400), (7, 4001000), (8, 3500875), (10, 2800700), (14, 2000500), (20, 1400350), (25, 1120280), (28, 1000250), (35, 800200), (40, 700175), (50, 560140), (56, 500125), (70, 400100), (100, 280070), (125, 224056), (140, 200050), (175, 160040), (200, 140035), (250, 112028), (280, 100025), (350, 80020), (500, 56014), (700, 40010), (875, 32008), (1000, 28007), (1400, 20005), (1750, 16004), (3500, 8002), (4001, 7000)]