217778825

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{71993}}^1$

素因数の和:72025

約数の個数: 18

約数和(自身を含む): 296831262

約数和(自身を除く): 79052437

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 3025, 71993, 359965, 791923, 1799825, 3959615, 8711153, 19798075, 43555765, 217778825]

約数ペア:

[(1, 217778825), (5, 43555765), (11, 19798075), (25, 8711153), (55, 3959615), (121, 1799825), (275, 791923), (605, 359965), (3025, 71993)]