18969320

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{4889}}^1$

素因数の和:4997

約数の個数: 32

約数和(自身を含む): 43129800

約数和(自身を除く): 24160480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 4889, 9778, 19556, 24445, 39112, 48890, 97780, 195560, 474233, 948466, 1896932, 2371165, 3793864, 4742330, 9484660, 18969320]

約数ペア:

[(1, 18969320), (2, 9484660), (4, 4742330), (5, 3793864), (8, 2371165), (10, 1896932), (20, 948466), (40, 474233), (97, 195560), (194, 97780), (388, 48890), (485, 39112), (776, 24445), (970, 19556), (1940, 9778), (3880, 4889)]