20571705

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1979}}^1$

素因数の和:2011

約数の個数: 64

約数和(自身を含む): 45619200

約数和(自身を除く): 25047495

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 27, 33, 35, 45, 55, 63, 77, 99, 105, 135, 165, 189, 231, 297, 315, 385, 495, 693, 945, 1155, 1485, 1979, 2079, 3465, 5937, 9895, 10395, 13853, 17811, 21769, 29685, 41559, 53433, 65307, 69265, 89055, 108845, 124677, 152383, 195921, 207795, 267165, 326535, 374031, 457149, 587763, 623385, 761915, 979605, 1371447, 1870155, 2285745, 2938815, 4114341, 6857235, 20571705]

約数ペア:

[(1, 20571705), (3, 6857235), (5, 4114341), (7, 2938815), (9, 2285745), (11, 1870155), (15, 1371447), (21, 979605), (27, 761915), (33, 623385), (35, 587763), (45, 457149), (55, 374031), (63, 326535), (77, 267165), (99, 207795), (105, 195921), (135, 152383), (165, 124677), (189, 108845), (231, 89055), (297, 69265), (315, 65307), (385, 53433), (495, 41559), (693, 29685), (945, 21769), (1155, 17811), (1485, 13853), (1979, 10395), (2079, 9895), (3465, 5937)]