21190221

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{827}}^1$

素因数の和:922

約数の個数: 32

約数和(自身を含む): 34312320

約数和(自身を除く): 13122099

約数列:

[1, 3, 9, 13, 27, 39, 73, 117, 219, 351, 657, 827, 949, 1971, 2481, 2847, 7443, 8541, 10751, 22329, 25623, 32253, 60371, 96759, 181113, 290277, 543339, 784823, 1630017, 2354469, 7063407, 21190221]

約数ペア:

[(1, 21190221), (3, 7063407), (9, 2354469), (13, 1630017), (27, 784823), (39, 543339), (73, 290277), (117, 181113), (219, 96759), (351, 60371), (657, 32253), (827, 25623), (949, 22329), (1971, 10751), (2481, 8541), (2847, 7443)]