21391821

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{7451}}^1$

素因数の和:7497

約数の個数: 24

約数和(自身を含む): 34875360

約数和(自身を除く): 13483539

約数列:

[1, 3, 9, 11, 29, 33, 87, 99, 261, 319, 957, 2871, 7451, 22353, 67059, 81961, 216079, 245883, 648237, 737649, 1944711, 2376869, 7130607, 21391821]

約数ペア:

[(1, 21391821), (3, 7130607), (9, 2376869), (11, 1944711), (29, 737649), (33, 648237), (87, 245883), (99, 216079), (261, 81961), (319, 67059), (957, 22353), (2871, 7451)]