18925263

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4231}}^1$

素因数の和:4315

約数の個数: 24

約数和(自身を含む): 31689216

約数和(自身を除く): 12763953

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4231, 4473, 12693, 29617, 38079, 88851, 266553, 300401, 901203, 2102807, 2703609, 6308421, 18925263]

約数ペア:

[(1, 18925263), (3, 6308421), (7, 2703609), (9, 2102807), (21, 901203), (63, 300401), (71, 266553), (213, 88851), (497, 38079), (639, 29617), (1491, 12693), (4231, 4473)]