21177519

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:295

約数の個数: 32

約数和(自身を含む): 31968000

約数和(自身を除く): 10790481

約数列:

[1, 3, 11, 33, 59, 73, 149, 177, 219, 447, 649, 803, 1639, 1947, 2409, 4307, 4917, 8791, 10877, 12921, 26373, 32631, 47377, 96701, 119647, 142131, 290103, 358941, 641743, 1925229, 7059173, 21177519]

約数ペア:

[(1, 21177519), (3, 7059173), (11, 1925229), (33, 641743), (59, 358941), (73, 290103), (149, 142131), (177, 119647), (219, 96701), (447, 47377), (649, 32631), (803, 26373), (1639, 12921), (1947, 10877), (2409, 8791), (4307, 4917)]