21720363

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{54437}}^1$

素因数の和:54466

約数の個数: 16

約数和(自身を含む): 34840320

約数和(自身を除く): 13119957

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 54437, 163311, 381059, 1034303, 1143177, 3102909, 7240121, 21720363]

約数ペア:

[(1, 21720363), (3, 7240121), (7, 3102909), (19, 1143177), (21, 1034303), (57, 381059), (133, 163311), (399, 54437)]