19911645

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{337}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 37647792

約数和(自身を除く): 17736147

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 101, 117, 195, 303, 337, 505, 585, 909, 1011, 1313, 1515, 1685, 3033, 3939, 4381, 4545, 5055, 6565, 11817, 13143, 15165, 19695, 21905, 34037, 39429, 59085, 65715, 102111, 170185, 197145, 306333, 442481, 510555, 1327443, 1531665, 2212405, 3982329, 6637215, 19911645]

約数ペア:

[(1, 19911645), (3, 6637215), (5, 3982329), (9, 2212405), (13, 1531665), (15, 1327443), (39, 510555), (45, 442481), (65, 306333), (101, 197145), (117, 170185), (195, 102111), (303, 65715), (337, 59085), (505, 39429), (585, 34037), (909, 21905), (1011, 19695), (1313, 15165), (1515, 13143), (1685, 11817), (3033, 6565), (3939, 5055), (4381, 4545)]