18965780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{229}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 41383440

約数和(自身を除く): 22417660

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 101, 164, 202, 205, 229, 404, 410, 458, 505, 820, 916, 1010, 1145, 2020, 2290, 4141, 4580, 8282, 9389, 16564, 18778, 20705, 23129, 37556, 41410, 46258, 46945, 82820, 92516, 93890, 115645, 187780, 231290, 462580, 948289, 1896578, 3793156, 4741445, 9482890, 18965780]

約数ペア:

[(1, 18965780), (2, 9482890), (4, 4741445), (5, 3793156), (10, 1896578), (20, 948289), (41, 462580), (82, 231290), (101, 187780), (164, 115645), (202, 93890), (205, 92516), (229, 82820), (404, 46945), (410, 46258), (458, 41410), (505, 37556), (820, 23129), (916, 20705), (1010, 18778), (1145, 16564), (2020, 9389), (2290, 8282), (4141, 4580)]