18917217

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 32011200

約数和(自身を除く): 13093983

約数列:

[1, 3, 9, 11, 19, 33, 57, 89, 99, 113, 171, 209, 267, 339, 627, 801, 979, 1017, 1243, 1691, 1881, 2147, 2937, 3729, 5073, 6441, 8811, 10057, 11187, 15219, 18601, 19323, 23617, 30171, 55803, 70851, 90513, 110627, 167409, 191083, 212553, 331881, 573249, 995643, 1719747, 2101913, 6305739, 18917217]

約数ペア:

[(1, 18917217), (3, 6305739), (9, 2101913), (11, 1719747), (19, 995643), (33, 573249), (57, 331881), (89, 212553), (99, 191083), (113, 167409), (171, 110627), (209, 90513), (267, 70851), (339, 55803), (627, 30171), (801, 23617), (979, 19323), (1017, 18601), (1243, 15219), (1691, 11187), (1881, 10057), (2147, 8811), (2937, 6441), (3729, 5073)]