21084231

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 33177600

約数和(自身を除く): 12093369

約数列:

[1, 3, 7, 21, 71, 79, 179, 213, 237, 497, 537, 553, 1253, 1491, 1659, 3759, 5609, 12709, 14141, 16827, 38127, 39263, 42423, 88963, 98987, 117789, 266889, 296961, 1004011, 3012033, 7028077, 21084231]

約数ペア:

[(1, 21084231), (3, 7028077), (7, 3012033), (21, 1004011), (71, 296961), (79, 266889), (179, 117789), (213, 98987), (237, 88963), (497, 42423), (537, 39263), (553, 38127), (1253, 16827), (1491, 14141), (1659, 12709), (3759, 5609)]