21442820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1579}}^1$

素因数の和:1692

約数の個数: 48

約数和(自身を含む): 52026240

約数和(自身を除く): 30583420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 97, 140, 194, 388, 485, 679, 970, 1358, 1579, 1940, 2716, 3158, 3395, 6316, 6790, 7895, 11053, 13580, 15790, 22106, 31580, 44212, 55265, 110530, 153163, 221060, 306326, 612652, 765815, 1072141, 1531630, 2144282, 3063260, 4288564, 5360705, 10721410, 21442820]

約数ペア:

[(1, 21442820), (2, 10721410), (4, 5360705), (5, 4288564), (7, 3063260), (10, 2144282), (14, 1531630), (20, 1072141), (28, 765815), (35, 612652), (70, 306326), (97, 221060), (140, 153163), (194, 110530), (388, 55265), (485, 44212), (679, 31580), (970, 22106), (1358, 15790), (1579, 13580), (1940, 11053), (2716, 7895), (3158, 6790), (3395, 6316)]