21505113

素因数分解:

$3^2\times 7^1\times {\mathrm{353}}^1\times {\mathrm{967}}^1$

素因数の和:1333

約数の個数: 24

約数和(自身を含む): 35637888

約数和(自身を除く): 14132775

約数列:

[1, 3, 7, 9, 21, 63, 353, 967, 1059, 2471, 2901, 3177, 6769, 7413, 8703, 20307, 22239, 60921, 341351, 1024053, 2389457, 3072159, 7168371, 21505113]

約数ペア:

[(1, 21505113), (3, 7168371), (7, 3072159), (9, 2389457), (21, 1024053), (63, 341351), (353, 60921), (967, 22239), (1059, 20307), (2471, 8703), (2901, 7413), (3177, 6769)]