212905

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1$

素因数の和:109

約数の個数: 24

約数和(自身を含む): 328320

約数和(自身を除く): 115415

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 79, 245, 385, 395, 539, 553, 869, 2695, 2765, 3871, 4345, 6083, 19355, 30415, 42581, 212905]

約数ペア:

[(1, 212905), (5, 42581), (7, 30415), (11, 19355), (35, 6083), (49, 4345), (55, 3871), (77, 2765), (79, 2695), (245, 869), (385, 553), (395, 539)]