21380458825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{191}}^1\times {\mathrm{6673}}^1$

素因数の和:6946

約数の個数: 48

約数和(自身を含む): 29554394112

約数和(自身を除く): 8173935287

約数列:

[1, 5, 11, 25, 55, 61, 191, 275, 305, 671, 955, 1525, 2101, 3355, 4775, 6673, 10505, 11651, 16775, 33365, 52525, 58255, 73403, 128161, 166825, 291275, 367015, 407053, 640805, 1274543, 1835075, 2035265, 3204025, 4477583, 6372715, 10176325, 14019973, 22387915, 31863575, 70099865, 77747123, 111939575, 350499325, 388735615, 855218353, 1943678075, 4276091765, 21380458825]

約数ペア:

[(1, 21380458825), (5, 4276091765), (11, 1943678075), (25, 855218353), (55, 388735615), (61, 350499325), (191, 111939575), (275, 77747123), (305, 70099865), (671, 31863575), (955, 22387915), (1525, 14019973), (2101, 10176325), (3355, 6372715), (4775, 4477583), (6673, 3204025), (10505, 2035265), (11651, 1835075), (16775, 1274543), (33365, 640805), (52525, 407053), (58255, 367015), (73403, 291275), (128161, 166825)]