21783440

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5557}}^1$

素因数の和:5584

約数の個数: 60

約数和(自身を含む): 58925916

約数和(自身を除く): 37142476

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5557, 11114, 22228, 27785, 38899, 44456, 55570, 77798, 88912, 111140, 155596, 194495, 222280, 272293, 311192, 388990, 444560, 544586, 622384, 777980, 1089172, 1361465, 1555960, 2178344, 2722930, 3111920, 4356688, 5445860, 10891720, 21783440]

約数ペア:

[(1, 21783440), (2, 10891720), (4, 5445860), (5, 4356688), (7, 3111920), (8, 2722930), (10, 2178344), (14, 1555960), (16, 1361465), (20, 1089172), (28, 777980), (35, 622384), (40, 544586), (49, 444560), (56, 388990), (70, 311192), (80, 272293), (98, 222280), (112, 194495), (140, 155596), (196, 111140), (245, 88912), (280, 77798), (392, 55570), (490, 44456), (560, 38899), (784, 27785), (980, 22228), (1960, 11114), (3920, 5557)]