21049455

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{653}}^1$

素因数の和:975

約数の個数: 32

約数和(自身を含む): 38674944

約数和(自身を除く): 17625489

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 307, 653, 921, 1535, 1959, 2149, 3265, 4571, 4605, 6447, 9795, 10745, 13713, 22855, 32235, 68565, 200471, 601413, 1002355, 1403297, 3007065, 4209891, 7016485, 21049455]

約数ペア:

[(1, 21049455), (3, 7016485), (5, 4209891), (7, 3007065), (15, 1403297), (21, 1002355), (35, 601413), (105, 200471), (307, 68565), (653, 32235), (921, 22855), (1535, 13713), (1959, 10745), (2149, 9795), (3265, 6447), (4571, 4605)]