21035391

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{137}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 31653888

約数和(自身を除く): 10618497

約数列:

[1, 3, 13, 31, 39, 93, 127, 137, 381, 403, 411, 1209, 1651, 1781, 3937, 4247, 4953, 5343, 11811, 12741, 17399, 51181, 52197, 55211, 153543, 165633, 226187, 539369, 678561, 1618107, 7011797, 21035391]

約数ペア:

[(1, 21035391), (3, 7011797), (13, 1618107), (31, 678561), (39, 539369), (93, 226187), (127, 165633), (137, 153543), (381, 55211), (403, 52197), (411, 51181), (1209, 17399), (1651, 12741), (1781, 11811), (3937, 5343), (4247, 4953)]