81311475

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2539}}^1$

素因数の和:2620

約数の個数: 48

約数和(自身を含む): 156220160

約数和(自身を除く): 74908685

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 61, 75, 105, 175, 183, 305, 427, 525, 915, 1281, 1525, 2135, 2539, 4575, 6405, 7617, 10675, 12695, 17773, 32025, 38085, 53319, 63475, 88865, 154879, 190425, 266595, 444325, 464637, 774395, 1084153, 1332975, 2323185, 3252459, 3871975, 5420765, 11615925, 16262295, 27103825, 81311475]

約数ペア:

[(1, 81311475), (3, 27103825), (5, 16262295), (7, 11615925), (15, 5420765), (21, 3871975), (25, 3252459), (35, 2323185), (61, 1332975), (75, 1084153), (105, 774395), (175, 464637), (183, 444325), (305, 266595), (427, 190425), (525, 154879), (915, 88865), (1281, 63475), (1525, 53319), (2135, 38085), (2539, 32025), (4575, 17773), (6405, 12695), (7617, 10675)]