20688921

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{3943}}^1$

素因数の和:4013

約数の個数: 24

約数和(自身を含む): 33224256

約数和(自身を除く): 12535335

約数列:

[1, 3, 9, 11, 33, 53, 99, 159, 477, 583, 1749, 3943, 5247, 11829, 35487, 43373, 130119, 208979, 390357, 626937, 1880811, 2298769, 6896307, 20688921]

約数ペア:

[(1, 20688921), (3, 6896307), (9, 2298769), (11, 1880811), (33, 626937), (53, 390357), (99, 208979), (159, 130119), (477, 43373), (583, 35487), (1749, 11829), (3943, 5247)]