21978345

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{1151}}^1$

素因数の和:1245

約数の個数: 32

約数和(自身を含む): 37601280

約数和(自身を除く): 15622935

約数列:

[1, 3, 5, 15, 19, 57, 67, 95, 201, 285, 335, 1005, 1151, 1273, 3453, 3819, 5755, 6365, 17265, 19095, 21869, 65607, 77117, 109345, 231351, 328035, 385585, 1156755, 1465223, 4395669, 7326115, 21978345]

約数ペア:

[(1, 21978345), (3, 7326115), (5, 4395669), (15, 1465223), (19, 1156755), (57, 385585), (67, 328035), (95, 231351), (201, 109345), (285, 77117), (335, 65607), (1005, 21869), (1151, 19095), (1273, 17265), (3453, 6365), (3819, 5755)]