21647780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{14057}}^1$

素因数の和:14084

約数の個数: 48

約数和(自身を含む): 56681856

約数和(自身を除く): 35034076

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 14057, 28114, 56228, 70285, 98399, 140570, 154627, 196798, 281140, 309254, 393596, 491995, 618508, 773135, 983990, 1082389, 1546270, 1967980, 2164778, 3092540, 4329556, 5411945, 10823890, 21647780]

約数ペア:

[(1, 21647780), (2, 10823890), (4, 5411945), (5, 4329556), (7, 3092540), (10, 2164778), (11, 1967980), (14, 1546270), (20, 1082389), (22, 983990), (28, 773135), (35, 618508), (44, 491995), (55, 393596), (70, 309254), (77, 281140), (110, 196798), (140, 154627), (154, 140570), (220, 98399), (308, 70285), (385, 56228), (770, 28114), (1540, 14057)]