21689140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{311}}^1\times {\mathrm{317}}^1$

素因数の和:648

約数の個数: 48

約数和(自身を含む): 50004864

約数和(自身を除く): 28315724

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 311, 317, 622, 634, 1244, 1268, 1555, 1585, 3110, 3170, 3421, 3487, 6220, 6340, 6842, 6974, 13684, 13948, 17105, 17435, 34210, 34870, 68420, 69740, 98587, 197174, 394348, 492935, 985870, 1084457, 1971740, 2168914, 4337828, 5422285, 10844570, 21689140]

約数ペア:

[(1, 21689140), (2, 10844570), (4, 5422285), (5, 4337828), (10, 2168914), (11, 1971740), (20, 1084457), (22, 985870), (44, 492935), (55, 394348), (110, 197174), (220, 98587), (311, 69740), (317, 68420), (622, 34870), (634, 34210), (1244, 17435), (1268, 17105), (1555, 13948), (1585, 13684), (3110, 6974), (3170, 6842), (3421, 6340), (3487, 6220)]