21355125

素因数分解:

$3^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{167}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 40255488

約数和(自身を除く): 18900363

約数列:

[1, 3, 5, 11, 15, 25, 31, 33, 55, 75, 93, 125, 155, 165, 167, 275, 341, 375, 465, 501, 775, 825, 835, 1023, 1375, 1705, 1837, 2325, 2505, 3875, 4125, 4175, 5115, 5177, 5511, 8525, 9185, 11625, 12525, 15531, 20875, 25575, 25885, 27555, 42625, 45925, 56947, 62625, 77655, 127875, 129425, 137775, 170841, 229625, 284735, 388275, 647125, 688875, 854205, 1423675, 1941375, 4271025, 7118375, 21355125]

約数ペア:

[(1, 21355125), (3, 7118375), (5, 4271025), (11, 1941375), (15, 1423675), (25, 854205), (31, 688875), (33, 647125), (55, 388275), (75, 284735), (93, 229625), (125, 170841), (155, 137775), (165, 129425), (167, 127875), (275, 77655), (341, 62625), (375, 56947), (465, 45925), (501, 42625), (775, 27555), (825, 25885), (835, 25575), (1023, 20875), (1375, 15531), (1705, 12525), (1837, 11625), (2325, 9185), (2505, 8525), (3875, 5511), (4125, 5177), (4175, 5115)]