21028128

素因数分解:

$2^5\times 3^1\times {\mathrm{11}}^1\times {\mathrm{19913}}^1$

素因数の和:19937

約数の個数: 48

約数和(自身を含む): 60219936

約数和(自身を除く): 39191808

約数列:

[1, 2, 3, 4, 6, 8, 11, 12, 16, 22, 24, 32, 33, 44, 48, 66, 88, 96, 132, 176, 264, 352, 528, 1056, 19913, 39826, 59739, 79652, 119478, 159304, 219043, 238956, 318608, 438086, 477912, 637216, 657129, 876172, 955824, 1314258, 1752344, 1911648, 2628516, 3504688, 5257032, 7009376, 10514064, 21028128]

約数ペア:

[(1, 21028128), (2, 10514064), (3, 7009376), (4, 5257032), (6, 3504688), (8, 2628516), (11, 1911648), (12, 1752344), (16, 1314258), (22, 955824), (24, 876172), (32, 657129), (33, 637216), (44, 477912), (48, 438086), (66, 318608), (88, 238956), (96, 219043), (132, 159304), (176, 119478), (264, 79652), (352, 59739), (528, 39826), (1056, 19913)]