21085687

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 27141120

約数和(自身を除く): 6055433

約数列:

[1, 7, 19, 23, 61, 113, 133, 161, 427, 437, 791, 1159, 1403, 2147, 2599, 3059, 6893, 8113, 9821, 15029, 18193, 26657, 48251, 49381, 130967, 158539, 186599, 345667, 916769, 1109773, 3012241, 21085687]

約数ペア:

[(1, 21085687), (7, 3012241), (19, 1109773), (23, 916769), (61, 345667), (113, 186599), (133, 158539), (161, 130967), (427, 49381), (437, 48251), (791, 26657), (1159, 18193), (1403, 15029), (2147, 9821), (2599, 8113), (3059, 6893)]