21997953

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{313}}^1$

素因数の和:478

約数の個数: 32

約数和(自身を含む): 34665600

約数和(自身を除く): 12667647

約数列:

[1, 3, 9, 19, 27, 57, 137, 171, 313, 411, 513, 939, 1233, 2603, 2817, 3699, 5947, 7809, 8451, 17841, 23427, 42881, 53523, 70281, 128643, 160569, 385929, 814739, 1157787, 2444217, 7332651, 21997953]

約数ペア:

[(1, 21997953), (3, 7332651), (9, 2444217), (19, 1157787), (27, 814739), (57, 385929), (137, 160569), (171, 128643), (313, 70281), (411, 53523), (513, 42881), (939, 23427), (1233, 17841), (2603, 8451), (2817, 7809), (3699, 5947)]