21791264

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1997}}^1$

素因数の和:2049

約数の個数: 48

約数和(自身を含む): 48335616

約数和(自身を除く): 26544352

約数列:

[1, 2, 4, 8, 11, 16, 22, 31, 32, 44, 62, 88, 124, 176, 248, 341, 352, 496, 682, 992, 1364, 1997, 2728, 3994, 5456, 7988, 10912, 15976, 21967, 31952, 43934, 61907, 63904, 87868, 123814, 175736, 247628, 351472, 495256, 680977, 702944, 990512, 1361954, 1981024, 2723908, 5447816, 10895632, 21791264]

約数ペア:

[(1, 21791264), (2, 10895632), (4, 5447816), (8, 2723908), (11, 1981024), (16, 1361954), (22, 990512), (31, 702944), (32, 680977), (44, 495256), (62, 351472), (88, 247628), (124, 175736), (176, 123814), (248, 87868), (341, 63904), (352, 61907), (496, 43934), (682, 31952), (992, 21967), (1364, 15976), (1997, 10912), (2728, 7988), (3994, 5456)]