20788911

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{557}}^1$

素因数の和:616

約数の個数: 48

約数和(自身を含む): 36560160

約数和(自身を除く): 15771249

約数列:

[1, 3, 9, 11, 13, 29, 33, 39, 87, 99, 117, 143, 261, 319, 377, 429, 557, 957, 1131, 1287, 1671, 2871, 3393, 4147, 5013, 6127, 7241, 12441, 16153, 18381, 21723, 37323, 48459, 55143, 65169, 79651, 145377, 177683, 209989, 238953, 533049, 629967, 716859, 1599147, 1889901, 2309879, 6929637, 20788911]

約数ペア:

[(1, 20788911), (3, 6929637), (9, 2309879), (11, 1889901), (13, 1599147), (29, 716859), (33, 629967), (39, 533049), (87, 238953), (99, 209989), (117, 177683), (143, 145377), (261, 79651), (319, 65169), (377, 55143), (429, 48459), (557, 37323), (957, 21723), (1131, 18381), (1287, 16153), (1671, 12441), (2871, 7241), (3393, 6127), (4147, 5013)]