18979565

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{383}}^1$

素因数の和:469

約数の個数: 32

約数和(自身を含む): 26873856

約数和(自身を除く): 7894291

約数列:

[1, 5, 11, 17, 53, 55, 85, 187, 265, 383, 583, 901, 935, 1915, 2915, 4213, 4505, 6511, 9911, 20299, 21065, 32555, 49555, 71621, 101495, 223289, 345083, 358105, 1116445, 1725415, 3795913, 18979565]

約数ペア:

[(1, 18979565), (5, 3795913), (11, 1725415), (17, 1116445), (53, 358105), (55, 345083), (85, 223289), (187, 101495), (265, 71621), (383, 49555), (583, 32555), (901, 21065), (935, 20299), (1915, 9911), (2915, 6511), (4213, 4505)]