21506485

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4297}}^1$

素因数の和:4333

約数の個数: 32

約数和(自身を含む): 34659072

約数和(自身を除く): 13152587

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 455, 715, 1001, 4297, 5005, 21485, 30079, 47267, 55861, 150395, 236335, 279305, 330869, 391027, 614471, 1654345, 1955135, 3072355, 4301297, 21506485]

約数ペア:

[(1, 21506485), (5, 4301297), (7, 3072355), (11, 1955135), (13, 1654345), (35, 614471), (55, 391027), (65, 330869), (77, 279305), (91, 236335), (143, 150395), (385, 55861), (455, 47267), (715, 30079), (1001, 21485), (4297, 5005)]