21132387

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{137}}^1\times {\mathrm{197}}^1$

素因数の和:372

約数の個数: 32

約数和(自身を含む): 32788800

約数和(自身を除く): 11656413

約数列:

[1, 3, 9, 27, 29, 87, 137, 197, 261, 411, 591, 783, 1233, 1773, 3699, 3973, 5319, 5713, 11919, 17139, 26989, 35757, 51417, 80967, 107271, 154251, 242901, 728703, 782681, 2348043, 7044129, 21132387]

約数ペア:

[(1, 21132387), (3, 7044129), (9, 2348043), (27, 782681), (29, 728703), (87, 242901), (137, 154251), (197, 107271), (261, 80967), (411, 51417), (591, 35757), (783, 26989), (1233, 17139), (1773, 11919), (3699, 5713), (3973, 5319)]