21052785

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{1009}}^1$

素因数の和:1137

約数の個数: 32

約数和(自身を含む): 36650880

約数和(自身を除く): 15598095

約数列:

[1, 3, 5, 13, 15, 39, 65, 107, 195, 321, 535, 1009, 1391, 1605, 3027, 4173, 5045, 6955, 13117, 15135, 20865, 39351, 65585, 107963, 196755, 323889, 539815, 1403519, 1619445, 4210557, 7017595, 21052785]

約数ペア:

[(1, 21052785), (3, 7017595), (5, 4210557), (13, 1619445), (15, 1403519), (39, 539815), (65, 323889), (107, 196755), (195, 107963), (321, 65585), (535, 39351), (1009, 20865), (1391, 15135), (1605, 13117), (3027, 6955), (4173, 5045)]