20580021

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{521}}^1$

素因数の和:567

約数の個数: 64

約数和(自身を含む): 40089600

約数和(自身を除く): 19509579

約数列:

[1, 3, 7, 9, 11, 19, 21, 27, 33, 57, 63, 77, 99, 133, 171, 189, 209, 231, 297, 399, 513, 521, 627, 693, 1197, 1463, 1563, 1881, 2079, 3591, 3647, 4389, 4689, 5643, 5731, 9899, 10941, 13167, 14067, 17193, 29697, 32823, 39501, 40117, 51579, 69293, 89091, 98469, 108889, 120351, 154737, 207879, 267273, 326667, 361053, 623637, 762223, 980001, 1083159, 1870911, 2286669, 2940003, 6860007, 20580021]

約数ペア:

[(1, 20580021), (3, 6860007), (7, 2940003), (9, 2286669), (11, 1870911), (19, 1083159), (21, 980001), (27, 762223), (33, 623637), (57, 361053), (63, 326667), (77, 267273), (99, 207879), (133, 154737), (171, 120351), (189, 108889), (209, 98469), (231, 89091), (297, 69293), (399, 51579), (513, 40117), (521, 39501), (627, 32823), (693, 29697), (1197, 17193), (1463, 14067), (1563, 13167), (1881, 10941), (2079, 9899), (3591, 5731), (3647, 5643), (4389, 4689)]