18917564

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^2$

素因数の和:198

約数の個数: 36

約数和(自身を含む): 35590464

約数和(自身を除く): 16672900

約数列:

[1, 2, 4, 31, 41, 61, 62, 82, 122, 124, 164, 244, 1271, 1891, 2501, 2542, 3721, 3782, 5002, 5084, 7442, 7564, 10004, 14884, 77531, 115351, 152561, 155062, 230702, 305122, 310124, 461404, 610244, 4729391, 9458782, 18917564]

約数ペア:

[(1, 18917564), (2, 9458782), (4, 4729391), (31, 610244), (41, 461404), (61, 310124), (62, 305122), (82, 230702), (122, 155062), (124, 152561), (164, 115351), (244, 77531), (1271, 14884), (1891, 10004), (2501, 7564), (2542, 7442), (3721, 5084), (3782, 5002)]