21281286

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{1087}}^1$

素因数の和:1356

約数の個数: 32

約数和(自身を含む): 46061568

約数和(自身を除く): 24780282

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 251, 502, 753, 1087, 1506, 2174, 3261, 3263, 6522, 6526, 9789, 14131, 19578, 28262, 42393, 84786, 272837, 545674, 818511, 1637022, 3546881, 7093762, 10640643, 21281286]

約数ペア:

[(1, 21281286), (2, 10640643), (3, 7093762), (6, 3546881), (13, 1637022), (26, 818511), (39, 545674), (78, 272837), (251, 84786), (502, 42393), (753, 28262), (1087, 19578), (1506, 14131), (2174, 9789), (3261, 6526), (3263, 6522)]