21244940

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{233}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 46230912

約数和(自身を除く): 24985972

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 97, 188, 194, 233, 235, 388, 466, 470, 485, 932, 940, 970, 1165, 1940, 2330, 4559, 4660, 9118, 10951, 18236, 21902, 22601, 22795, 43804, 45202, 45590, 54755, 90404, 91180, 109510, 113005, 219020, 226010, 452020, 1062247, 2124494, 4248988, 5311235, 10622470, 21244940]

約数ペア:

[(1, 21244940), (2, 10622470), (4, 5311235), (5, 4248988), (10, 2124494), (20, 1062247), (47, 452020), (94, 226010), (97, 219020), (188, 113005), (194, 109510), (233, 91180), (235, 90404), (388, 54755), (466, 45590), (470, 45202), (485, 43804), (932, 22795), (940, 22601), (970, 21902), (1165, 18236), (1940, 10951), (2330, 9118), (4559, 4660)]