21011739

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7523}}^1$

素因数の和:7559

約数の個数: 24

約数和(自身を含む): 34309440

約数和(自身を除く): 13297701

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7523, 22569, 52661, 142937, 157983, 368627, 428811, 1000559, 1105881, 3001677, 7003913, 21011739]

約数ペア:

[(1, 21011739), (3, 7003913), (7, 3001677), (19, 1105881), (21, 1000559), (49, 428811), (57, 368627), (133, 157983), (147, 142937), (399, 52661), (931, 22569), (2793, 7523)]