21255801

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{317}}^1$

素因数の和:461

約数の個数: 32

約数和(自身を含む): 33865728

約数和(自身を除く): 12609927

約数列:

[1, 3, 7, 21, 31, 93, 103, 217, 309, 317, 651, 721, 951, 2163, 2219, 3193, 6657, 9579, 9827, 22351, 29481, 32651, 67053, 68789, 97953, 206367, 228557, 685671, 1012181, 3036543, 7085267, 21255801]

約数ペア:

[(1, 21255801), (3, 7085267), (7, 3036543), (21, 1012181), (31, 685671), (93, 228557), (103, 206367), (217, 97953), (309, 68789), (317, 67053), (651, 32651), (721, 29481), (951, 22351), (2163, 9827), (2219, 9579), (3193, 6657)]