20003865

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{271}}^1$

素因数の和:342

約数の個数: 64

約数和(自身を含む): 39690240

約数和(自身を除く): 19686375

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 37, 57, 95, 105, 111, 133, 185, 259, 271, 285, 399, 555, 665, 703, 777, 813, 1295, 1355, 1897, 1995, 2109, 3515, 3885, 4065, 4921, 5149, 5691, 9485, 10027, 10545, 14763, 15447, 24605, 25745, 28455, 30081, 36043, 50135, 70189, 73815, 77235, 108129, 150405, 180215, 190513, 210567, 350945, 540645, 571539, 952565, 1052835, 1333591, 2857695, 4000773, 6667955, 20003865]

約数ペア:

[(1, 20003865), (3, 6667955), (5, 4000773), (7, 2857695), (15, 1333591), (19, 1052835), (21, 952565), (35, 571539), (37, 540645), (57, 350945), (95, 210567), (105, 190513), (111, 180215), (133, 150405), (185, 108129), (259, 77235), (271, 73815), (285, 70189), (399, 50135), (555, 36043), (665, 30081), (703, 28455), (777, 25745), (813, 24605), (1295, 15447), (1355, 14763), (1897, 10545), (1995, 10027), (2109, 9485), (3515, 5691), (3885, 5149), (4065, 4921)]