21089740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1553}}^1$

素因数の和:1666

約数の個数: 48

約数和(自身を含む): 51170112

約数和(自身を除く): 30080372

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 97, 140, 194, 388, 485, 679, 970, 1358, 1553, 1940, 2716, 3106, 3395, 6212, 6790, 7765, 10871, 13580, 15530, 21742, 31060, 43484, 54355, 108710, 150641, 217420, 301282, 602564, 753205, 1054487, 1506410, 2108974, 3012820, 4217948, 5272435, 10544870, 21089740]

約数ペア:

[(1, 21089740), (2, 10544870), (4, 5272435), (5, 4217948), (7, 3012820), (10, 2108974), (14, 1506410), (20, 1054487), (28, 753205), (35, 602564), (70, 301282), (97, 217420), (140, 150641), (194, 108710), (388, 54355), (485, 43484), (679, 31060), (970, 21742), (1358, 15530), (1553, 13580), (1940, 10871), (2716, 7765), (3106, 6790), (3395, 6212)]