21000691754

素因数分解:

$2^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{275087}}^1$

素因数の和:275163

約数の個数: 48

約数和(自身を含む): 39513640320

約数和(自身を除く): 18512948566

約数列:

[1, 2, 7, 14, 19, 38, 41, 49, 82, 98, 133, 266, 287, 574, 779, 931, 1558, 1862, 2009, 4018, 5453, 10906, 38171, 76342, 275087, 550174, 1925609, 3851218, 5226653, 10453306, 11278567, 13479263, 22557134, 26958526, 36586571, 73173142, 78949969, 157899938, 214292773, 256105997, 428585546, 512211994, 552649783, 1105299566, 1500049411, 3000098822, 10500345877, 21000691754]

約数ペア:

[(1, 21000691754), (2, 10500345877), (7, 3000098822), (14, 1500049411), (19, 1105299566), (38, 552649783), (41, 512211994), (49, 428585546), (82, 256105997), (98, 214292773), (133, 157899938), (266, 78949969), (287, 73173142), (574, 36586571), (779, 26958526), (931, 22557134), (1558, 13479263), (1862, 11278567), (2009, 10453306), (4018, 5226653), (5453, 3851218), (10906, 1925609), (38171, 550174), (76342, 275087)]