21749145

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{521}}^1$

素因数の和:574

約数の個数: 48

約数和(自身を含む): 39989376

約数和(自身を除く): 18240231

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 121, 165, 253, 345, 363, 521, 605, 759, 1265, 1563, 1815, 2605, 2783, 3795, 5731, 7815, 8349, 11983, 13915, 17193, 28655, 35949, 41745, 59915, 63041, 85965, 131813, 179745, 189123, 315205, 395439, 659065, 945615, 1449943, 1977195, 4349829, 7249715, 21749145]

約数ペア:

[(1, 21749145), (3, 7249715), (5, 4349829), (11, 1977195), (15, 1449943), (23, 945615), (33, 659065), (55, 395439), (69, 315205), (115, 189123), (121, 179745), (165, 131813), (253, 85965), (345, 63041), (363, 59915), (521, 41745), (605, 35949), (759, 28655), (1265, 17193), (1563, 13915), (1815, 11983), (2605, 8349), (2783, 7815), (3795, 5731)]