21978260

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{11329}}^1$

素因数の和:11435

約数の個数: 24

約数和(自身を含む): 46634280

約数和(自身を除く): 24656020

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 11329, 22658, 45316, 56645, 113290, 226580, 1098913, 2197826, 4395652, 5494565, 10989130, 21978260]

約数ペア:

[(1, 21978260), (2, 10989130), (4, 5494565), (5, 4395652), (10, 2197826), (20, 1098913), (97, 226580), (194, 113290), (388, 56645), (485, 45316), (970, 22658), (1940, 11329)]