21730737

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{509}}^1$

素因数の和:645

約数の個数: 32

約数和(自身を含む): 35251200

約数和(自身を除く): 13520463

約数列:

[1, 3, 7, 19, 21, 57, 107, 133, 321, 399, 509, 749, 1527, 2033, 2247, 3563, 6099, 9671, 10689, 14231, 29013, 42693, 54463, 67697, 163389, 203091, 381241, 1034797, 1143723, 3104391, 7243579, 21730737]

約数ペア:

[(1, 21730737), (3, 7243579), (7, 3104391), (19, 1143723), (21, 1034797), (57, 381241), (107, 203091), (133, 163389), (321, 67697), (399, 54463), (509, 42693), (749, 29013), (1527, 14231), (2033, 10689), (2247, 9671), (3563, 6099)]