21911978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:171

約数の個数: 48

約数和(自身を含む): 39502080

約数和(自身を除く): 17590102

約数列:

[1, 2, 11, 19, 22, 31, 38, 62, 89, 178, 209, 341, 361, 418, 589, 682, 722, 979, 1178, 1691, 1958, 2759, 3382, 3971, 5518, 6479, 7942, 11191, 12958, 18601, 22382, 30349, 32129, 37202, 52421, 60698, 64258, 104842, 123101, 246202, 353419, 576631, 706838, 995999, 1153262, 1991998, 10955989, 21911978]

約数ペア:

[(1, 21911978), (2, 10955989), (11, 1991998), (19, 1153262), (22, 995999), (31, 706838), (38, 576631), (62, 353419), (89, 246202), (178, 123101), (209, 104842), (341, 64258), (361, 60698), (418, 52421), (589, 37202), (682, 32129), (722, 30349), (979, 22382), (1178, 18601), (1691, 12958), (1958, 11191), (2759, 7942), (3382, 6479), (3971, 5518)]