21295143

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:269

約数の個数: 40

約数和(自身を含む): 34063920

約数和(自身を除く): 12768777

約数列:

[1, 3, 9, 19, 27, 57, 81, 101, 137, 171, 303, 411, 513, 909, 1233, 1539, 1919, 2603, 2727, 3699, 5757, 7809, 8181, 11097, 13837, 17271, 23427, 41511, 51813, 70281, 124533, 155439, 210843, 262903, 373599, 788709, 1120797, 2366127, 7098381, 21295143]

約数ペア:

[(1, 21295143), (3, 7098381), (9, 2366127), (19, 1120797), (27, 788709), (57, 373599), (81, 262903), (101, 210843), (137, 155439), (171, 124533), (303, 70281), (411, 51813), (513, 41511), (909, 23427), (1233, 17271), (1539, 13837), (1919, 11097), (2603, 8181), (2727, 7809), (3699, 5757)]