21220647

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{881}}^1$

素因数の和:959

約数の個数: 32

約数和(自身を含む): 34320384

約数和(自身を除く): 13099737

約数列:

[1, 3, 7, 21, 31, 37, 93, 111, 217, 259, 651, 777, 881, 1147, 2643, 3441, 6167, 8029, 18501, 24087, 27311, 32597, 81933, 97791, 191177, 228179, 573531, 684537, 1010507, 3031521, 7073549, 21220647]

約数ペア:

[(1, 21220647), (3, 7073549), (7, 3031521), (21, 1010507), (31, 684537), (37, 573531), (93, 228179), (111, 191177), (217, 97791), (259, 81933), (651, 32597), (777, 27311), (881, 24087), (1147, 18501), (2643, 8029), (3441, 6167)]