213780385

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{67121}}^1$

素因数の和:67153

約数の個数: 24

約数和(自身を含む): 321380136

約数和(自身を除く): 107599751

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 67121, 335605, 469847, 872573, 2349235, 3288929, 4362865, 6108011, 16444645, 30540055, 42756077, 213780385]

約数ペア:

[(1, 213780385), (5, 42756077), (7, 30540055), (13, 16444645), (35, 6108011), (49, 4362865), (65, 3288929), (91, 2349235), (245, 872573), (455, 469847), (637, 335605), (3185, 67121)]