20561211

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{643}}^1$

素因数の和:696

約数の個数: 48

約数和(自身を含む): 36167040

約数和(自身を除く): 15605829

約数列:

[1, 3, 9, 11, 17, 19, 33, 51, 57, 99, 153, 171, 187, 209, 323, 561, 627, 643, 969, 1683, 1881, 1929, 2907, 3553, 5787, 7073, 10659, 10931, 12217, 21219, 31977, 32793, 36651, 63657, 98379, 109953, 120241, 134387, 207689, 360723, 403161, 623067, 1082169, 1209483, 1869201, 2284579, 6853737, 20561211]

約数ペア:

[(1, 20561211), (3, 6853737), (9, 2284579), (11, 1869201), (17, 1209483), (19, 1082169), (33, 623067), (51, 403161), (57, 360723), (99, 207689), (153, 134387), (171, 120241), (187, 109953), (209, 98379), (323, 63657), (561, 36651), (627, 32793), (643, 31977), (969, 21219), (1683, 12217), (1881, 10931), (1929, 10659), (2907, 7073), (3553, 5787)]