21163948

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{691}}^1$

素因数の和:758

約数の個数: 48

約数和(自身を含む): 43402240

約数和(自身を除く): 22238292

約数列:

[1, 2, 4, 13, 19, 26, 31, 38, 52, 62, 76, 124, 247, 403, 494, 589, 691, 806, 988, 1178, 1382, 1612, 2356, 2764, 7657, 8983, 13129, 15314, 17966, 21421, 26258, 30628, 35932, 42842, 52516, 85684, 170677, 278473, 341354, 406999, 556946, 682708, 813998, 1113892, 1627996, 5290987, 10581974, 21163948]

約数ペア:

[(1, 21163948), (2, 10581974), (4, 5290987), (13, 1627996), (19, 1113892), (26, 813998), (31, 682708), (38, 556946), (52, 406999), (62, 341354), (76, 278473), (124, 170677), (247, 85684), (403, 52516), (494, 42842), (589, 35932), (691, 30628), (806, 26258), (988, 21421), (1178, 17966), (1382, 15314), (1612, 13129), (2356, 8983), (2764, 7657)]