19857915

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{521}}^1$

素因数の和:561

約数の個数: 72

約数和(自身を含む): 43321824

約数和(自身を除く): 23463909

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 45, 55, 63, 77, 99, 105, 121, 165, 231, 315, 363, 385, 495, 521, 605, 693, 847, 1089, 1155, 1563, 1815, 2541, 2605, 3465, 3647, 4235, 4689, 5445, 5731, 7623, 7815, 10941, 12705, 17193, 18235, 23445, 28655, 32823, 38115, 40117, 51579, 54705, 63041, 85965, 120351, 164115, 189123, 200585, 257895, 315205, 361053, 441287, 567369, 601755, 945615, 1323861, 1805265, 2206435, 2836845, 3971583, 6619305, 19857915]

約数ペア:

[(1, 19857915), (3, 6619305), (5, 3971583), (7, 2836845), (9, 2206435), (11, 1805265), (15, 1323861), (21, 945615), (33, 601755), (35, 567369), (45, 441287), (55, 361053), (63, 315205), (77, 257895), (99, 200585), (105, 189123), (121, 164115), (165, 120351), (231, 85965), (315, 63041), (363, 54705), (385, 51579), (495, 40117), (521, 38115), (605, 32823), (693, 28655), (847, 23445), (1089, 18235), (1155, 17193), (1563, 12705), (1815, 10941), (2541, 7815), (2605, 7623), (3465, 5731), (3647, 5445), (4235, 4689)]