20025525

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1$

素因数の和:115

約数の個数: 96

約数和(自身を含む): 39997440

約数和(自身を除く): 19971915

約数列:

[1, 3, 5, 13, 15, 19, 23, 25, 39, 47, 57, 65, 69, 75, 95, 115, 141, 195, 235, 247, 285, 299, 325, 345, 437, 475, 575, 611, 705, 741, 893, 897, 975, 1081, 1175, 1235, 1311, 1425, 1495, 1725, 1833, 2185, 2679, 3055, 3243, 3525, 3705, 4465, 4485, 5405, 5681, 6175, 6555, 7475, 9165, 10925, 11609, 13395, 14053, 15275, 16215, 17043, 18525, 20539, 22325, 22425, 27025, 28405, 32775, 34827, 42159, 45825, 58045, 61617, 66975, 70265, 81075, 85215, 102695, 142025, 174135, 210795, 267007, 290225, 308085, 351325, 426075, 513475, 801021, 870675, 1053975, 1335035, 1540425, 4005105, 6675175, 20025525]

約数ペア:

[(1, 20025525), (3, 6675175), (5, 4005105), (13, 1540425), (15, 1335035), (19, 1053975), (23, 870675), (25, 801021), (39, 513475), (47, 426075), (57, 351325), (65, 308085), (69, 290225), (75, 267007), (95, 210795), (115, 174135), (141, 142025), (195, 102695), (235, 85215), (247, 81075), (285, 70265), (299, 66975), (325, 61617), (345, 58045), (437, 45825), (475, 42159), (575, 34827), (611, 32775), (705, 28405), (741, 27025), (893, 22425), (897, 22325), (975, 20539), (1081, 18525), (1175, 17043), (1235, 16215), (1311, 15275), (1425, 14053), (1495, 13395), (1725, 11609), (1833, 10925), (2185, 9165), (2679, 7475), (3055, 6555), (3243, 6175), (3525, 5681), (3705, 5405), (4465, 4485)]