20659520

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{401}}^1$

素因数の和:448

約数の個数: 112

約数和(自身を含む): 58814208

約数和(自身を除く): 38154688

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 64, 70, 80, 92, 112, 115, 140, 160, 161, 184, 224, 230, 280, 320, 322, 368, 401, 448, 460, 560, 644, 736, 802, 805, 920, 1120, 1288, 1472, 1604, 1610, 1840, 2005, 2240, 2576, 2807, 3208, 3220, 3680, 4010, 5152, 5614, 6416, 6440, 7360, 8020, 9223, 10304, 11228, 12832, 12880, 14035, 16040, 18446, 22456, 25664, 25760, 28070, 32080, 36892, 44912, 46115, 51520, 56140, 64160, 64561, 73784, 89824, 92230, 112280, 128320, 129122, 147568, 179648, 184460, 224560, 258244, 295136, 322805, 368920, 449120, 516488, 590272, 645610, 737840, 898240, 1032976, 1291220, 1475680, 2065952, 2582440, 2951360, 4131904, 5164880, 10329760, 20659520]

約数ペア:

[(1, 20659520), (2, 10329760), (4, 5164880), (5, 4131904), (7, 2951360), (8, 2582440), (10, 2065952), (14, 1475680), (16, 1291220), (20, 1032976), (23, 898240), (28, 737840), (32, 645610), (35, 590272), (40, 516488), (46, 449120), (56, 368920), (64, 322805), (70, 295136), (80, 258244), (92, 224560), (112, 184460), (115, 179648), (140, 147568), (160, 129122), (161, 128320), (184, 112280), (224, 92230), (230, 89824), (280, 73784), (320, 64561), (322, 64160), (368, 56140), (401, 51520), (448, 46115), (460, 44912), (560, 36892), (644, 32080), (736, 28070), (802, 25760), (805, 25664), (920, 22456), (1120, 18446), (1288, 16040), (1472, 14035), (1604, 12880), (1610, 12832), (1840, 11228), (2005, 10304), (2240, 9223), (2576, 8020), (2807, 7360), (3208, 6440), (3220, 6416), (3680, 5614), (4010, 5152)]